diff --git a/curriculum/challenges/english/06-quality-assurance/quality-assurance-projects/american-british-translator.english.md b/curriculum/challenges/english/06-quality-assurance/quality-assurance-projects/american-british-translator.english.md
index 641697e2b6..eadbc4d7fb 100644
--- a/curriculum/challenges/english/06-quality-assurance/quality-assurance-projects/american-british-translator.english.md
+++ b/curriculum/challenges/english/06-quality-assurance/quality-assurance-projects/american-british-translator.english.md
@@ -2,7 +2,7 @@
 id: 5e601c0d5ac9d0ecd8b94afe
 title: American British Translator
 challengeType: 4
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/06-quality-assurance/quality-assurance-projects/sudoku-solver.english.md b/curriculum/challenges/english/06-quality-assurance/quality-assurance-projects/sudoku-solver.english.md
index 673583a47c..5db9e45ce4 100644
--- a/curriculum/challenges/english/06-quality-assurance/quality-assurance-projects/sudoku-solver.english.md
+++ b/curriculum/challenges/english/06-quality-assurance/quality-assurance-projects/sudoku-solver.english.md
@@ -2,7 +2,7 @@
 id: 5e601bf95ac9d0ecd8b94afd
 title: Sudoku Solver
 challengeType: 4
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
@@ -25,7 +25,7 @@ Start this project on Glitch using <a href='https://glitch.com/edit/#!/remix/clo
 
 ```yml
 tests:
-  - text: I can enter a sudoku puzzle by filling in the text area with either a number or period (.) to represent an empty cell. 
+  - text: I can enter a sudoku puzzle by filling in the text area with either a number or period (.) to represent an empty cell.
     testString: ''
   - text: When a valid number is entered in the text area, the same number is applied to the correct cell of the sudoku grid.
     testString: ''
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/build-your-own-functions.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/build-your-own-functions.english.md
index 3e4f91f2f3..f3911a4a2c 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/build-your-own-functions.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/build-your-own-functions.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f060b6c005b0e76f05b
 title: Build your own Functions
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: nLDychdBwUg
 ---
@@ -33,37 +33,37 @@ question:
   answers:
     - |
         Zap
-        
+
         ABC
-        
+
         jane
-        
+
         fred
-        
+
         jane
     - |
         Zap
-        
+
         ABC
-        
+
         Zap
     - |
         ABC
-        
+
         Zap
-        
+
         jane
     - |
         ABC
-        
+
         Zap
-        
+
         ABC
     - |
         Zap
-        
+
         Zap
-        
+
         Zap
   solution: 4
 ```
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/comparing-and-sorting-tuples.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/comparing-and-sorting-tuples.english.md
index 6caa719faa..3b00668b57 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/comparing-and-sorting-tuples.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/comparing-and-sorting-tuples.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f0b0b6c005b0e76f06d
 title: Comparing and Sorting Tuples
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: dZXzBXUxxCs
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/conditional-execution.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/conditional-execution.english.md
index 8e1c03c34b..53caf6abd9 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/conditional-execution.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/conditional-execution.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f050b6c005b0e76f058
 title: Conditional Execution
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: gz_IfIsZQtc
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/data-visualization-mailing-lists.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/data-visualization-mailing-lists.english.md
index 1e203580f0..6eb7780444 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/data-visualization-mailing-lists.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/data-visualization-mailing-lists.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f6a0b6c005b0e76f097
 title: 'Data Visualization: Mailing Lists'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: RYdW660KkaQ
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/data-visualization-page-rank.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/data-visualization-page-rank.english.md
index b207a4ce9f..c32adbd021 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/data-visualization-page-rank.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/data-visualization-page-rank.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f6a0b6c005b0e76f096
 title: 'Data Visualization: Page Rank'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: 6-w_qIUwaxU
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/dictionaries-and-loops.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/dictionaries-and-loops.english.md
index 97748847d3..82ccfb41db 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/dictionaries-and-loops.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/dictionaries-and-loops.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f0a0b6c005b0e76f069
 title: Dictionaries and Loops
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: EEmekKiKG70
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/dictionaries-common-applications.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/dictionaries-common-applications.english.md
index 10d9fbe101..4f107cfd97 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/dictionaries-common-applications.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/dictionaries-common-applications.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f090b6c005b0e76f068
 title: "Dictionaries: Common Applications"
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: f17xPfIXct0
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/files-as-a-sequence.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/files-as-a-sequence.english.md
index 2af093ff05..18443807cd 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/files-as-a-sequence.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/files-as-a-sequence.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f080b6c005b0e76f063
 title: Files as a Sequence
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: cIA0EokbaHE
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/intermediate-expressions.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/intermediate-expressions.english.md
index e673f5e1ac..ae36985c53 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/intermediate-expressions.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/intermediate-expressions.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f050b6c005b0e76f057
 title: Intermediate Expressions
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: dKgUaIa5ATg
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/intermediate-strings.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/intermediate-strings.english.md
index fec1aed169..6044df80bf 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/intermediate-strings.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/intermediate-strings.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f070b6c005b0e76f061
 title: Intermediate Strings
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: KgT_fYLXnyk
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/introduction-elements-of-python.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/introduction-elements-of-python.md
index 8bf9232d0a..9c025d6bdd 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/introduction-elements-of-python.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/introduction-elements-of-python.md
@@ -2,7 +2,7 @@
 id: 5e6a54c358d3af90110a60a3
 title: 'Introduction: Elements of Python'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: aRY_xjL35v0
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/introduction-hardware-achitecture.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/introduction-hardware-achitecture.english.md
index 0e28239fba..4358816c2c 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/introduction-hardware-achitecture.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/introduction-hardware-achitecture.english.md
@@ -2,7 +2,7 @@
 id: 5e6a54af58d3af90110a60a1
 title: 'Introduction: Hardware Architecture'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: H6qtjRTfSog
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/introduction-python-as-a-language.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/introduction-python-as-a-language.english.md
index d2f9bca619..54ed8a07fb 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/introduction-python-as-a-language.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/introduction-python-as-a-language.english.md
@@ -2,7 +2,7 @@
 id: 5e6a54ba58d3af90110a60a2
 title: 'Introduction: Python as a Language'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: 0QeGbZNS_bY
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/introduction-why-program.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/introduction-why-program.english.md
index 7bb9509ac3..20c39cb1c3 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/introduction-why-program.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/introduction-why-program.english.md
@@ -2,7 +2,7 @@
 id: 5e6a54a558d3af90110a60a0
 title: 'Introduction: Why Program?'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: 3muQV-Im3Z0
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/iterations-definite-loops.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/iterations-definite-loops.english.md
index 0f77171fb9..d59229e747 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/iterations-definite-loops.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/iterations-definite-loops.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f070b6c005b0e76f05d
 title: 'Iterations: Definite Loops'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: hiRTRAqNlpE
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/iterations-loop-idioms.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/iterations-loop-idioms.english.md
index 292d385910..c17ff645fe 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/iterations-loop-idioms.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/iterations-loop-idioms.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f070b6c005b0e76f05e
 title: 'Iterations: Loop Idioms'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: AelGAcoMXbI
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/iterations-more-patterns.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/iterations-more-patterns.english.md
index f1eb148eb5..d2d67e000d 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/iterations-more-patterns.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/iterations-more-patterns.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f070b6c005b0e76f05f
 title: 'Iterations: More Patterns'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: 9Wtqo6vha1M
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/loops-and-iterations.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/loops-and-iterations.english.md
index a5941ae9c4..c6a78834cd 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/loops-and-iterations.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/loops-and-iterations.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f060b6c005b0e76f05c
 title: Loops and Iterations
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: dLA-szNRnUY
 ---
@@ -30,27 +30,27 @@ question:
   answers:
     - |
         0
-        
+
         1
-        
+
         2
     - |
         0
-        
+
         1
-        
+
         2
-        
+
         3
     - |
         1
-        
+
         2
     - |
         1
-        
+
         2
-        
+
         3
   solution: 1
 ```
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/make-a-relational-database.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/make-a-relational-database.english.md
index aa53e3aae4..3193d4f39b 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/make-a-relational-database.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/make-a-relational-database.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f170b6c005b0e76f08b
 title: Make a Relational Database
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: MQ5z4bdF92U
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/more-conditional-structures.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/more-conditional-structures.english.md
index 83e5f48d89..3d2674681f 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/more-conditional-structures.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/more-conditional-structures.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f060b6c005b0e76f059
 title: More Conditional Structures
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: HdL82tAZR20
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-protocol.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-protocol.english.md
index 737768a20f..bbd5c09be6 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-protocol.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-protocol.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f0c0b6c005b0e76f072
 title: Networking Protocol
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: c6vZGescaSc
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-text-processing.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-text-processing.english.md
index 8e123c87b4..fd9f4ab137 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-text-processing.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-text-processing.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f0c0b6c005b0e76f074
 title: 'Networking: Text Processing'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: Pv_pJgVu8WI
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-using-urllib-in-python.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-using-urllib-in-python.md
index 57702e3136..0417fbd066 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-using-urllib-in-python.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-using-urllib-in-python.md
@@ -2,7 +2,7 @@
 id: 5e7b9f0d0b6c005b0e76f075
 title: 'Networking: Using urllib in Python'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: 7lFM1T_CxBs
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-web-scraping-with-python.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-web-scraping-with-python.english.md
index 73745be63b..82c2ec9ec1 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-web-scraping-with-python.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-web-scraping-with-python.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f0d0b6c005b0e76f076
 title: 'Networking: Web Scraping with Python'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: Uyioq2q4cEg
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-with-python.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-with-python.english.md
index f21d627999..9185933c77 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-with-python.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-with-python.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f0c0b6c005b0e76f071
 title: Networking with Python
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: _kJvneKVdNM
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-write-a-web-browser.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-write-a-web-browser.english.md
index 636436bfc8..23e8299945 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-write-a-web-browser.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/networking-write-a-web-browser.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f0c0b6c005b0e76f073
 title: 'Networking: Write a Web Browser'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: zjyT9DaAjx4
 ---
@@ -22,12 +22,12 @@ question:
 
     ```py
     import socket
- 
+
     mysock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
     mysock.connect(('data.pr4e.org', 80))
     cmd = 'GET http://data.pr4e.org/romeo.txt HTTP/1.0\r\n\r\n'.encode()
     mysock.send(cmd)
-    
+
     while True:
         data = mysock.recv(512)
         if len(data) < 1:
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/object-lifecycle.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/object-lifecycle.english.md
index 4ccf906e3e..516c54c9e5 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/object-lifecycle.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/object-lifecycle.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f170b6c005b0e76f087
 title: Object Lifecycle
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: p1r3h_AMMIM
 ---
@@ -40,7 +40,7 @@ question:
   answers:
     - |
         Quincy constructed
-        
+
         Miya constructed
 
         Quincy party count 1
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/objects-a-sample-class.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/objects-a-sample-class.english.md
index fa59bf89b3..a1fbc087a0 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/objects-a-sample-class.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/objects-a-sample-class.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f160b6c005b0e76f086
 title: 'Objects: A Sample Class'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: FiABKEuaSJ8
 ---
@@ -33,7 +33,7 @@ question:
   answers:
     - |
         So far 1
-        
+
         So far 2
     - |
         0
@@ -45,7 +45,7 @@ question:
         2
     - |
         2
-    
+
         4
   solution: 4
 ```
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/objects-inheritance.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/objects-inheritance.english.md
index 0c99256bb1..729e0a0633 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/objects-inheritance.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/objects-inheritance.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f170b6c005b0e76f088
 title: 'Objects: Inheritance'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: FBL3alYrxRM
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/python-dictionaries.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/python-dictionaries.english.md
index bec43aec23..2c480c2633 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/python-dictionaries.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/python-dictionaries.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f090b6c005b0e76f067
 title: Python Dictionaries
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: dnzvfimrRMg
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/python-functions.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/python-functions.english.md
index 4772398dc1..7c0b178220 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/python-functions.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/python-functions.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f060b6c005b0e76f05a
 title: Python Functions
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: 3JGF-n3tDPU
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/python-lists.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/python-lists.english.md
index a22db1c034..0129f11cf9 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/python-lists.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/python-lists.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f080b6c005b0e76f064
 title: Python Lists
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: Y0cvfDpYC_c
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/python-objects.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/python-objects.english.md
index 10deb7fc73..85e8734dfb 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/python-objects.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/python-objects.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f160b6c005b0e76f085
 title: Python Objects
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: uJxGeTYy0us
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/reading-files.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/reading-files.english.md
index 40d2016624..98bcf6f765 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/reading-files.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/reading-files.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f080b6c005b0e76f062
 title: Reading Files
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: Fo1tW09KIwo
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/regular-expressions-matching-and-extracting-data.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/regular-expressions-matching-and-extracting-data.english.md
index de581d19e8..8daea11cea 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/regular-expressions-matching-and-extracting-data.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/regular-expressions-matching-and-extracting-data.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f0b0b6c005b0e76f06f
 title: 'Regular Expressions: Matching and Extracting Data'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: LaCZnTbQGkE
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/regular-expressions-practical-applications.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/regular-expressions-practical-applications.english.md
index bf64f41a2d..2cc246b8cc 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/regular-expressions-practical-applications.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/regular-expressions-practical-applications.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f0b0b6c005b0e76f070
 title: 'Regular Expressions: Practical Applications'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: xCjFU9G6x48
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/regular-expressions.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/regular-expressions.english.md
index 3a5c8a9bd9..d800d92117 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/regular-expressions.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/regular-expressions.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f0b0b6c005b0e76f06e
 title: Regular Expressions
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: Yud_COr6pZo
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-database-design.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-database-design.english.md
index ec556f55c5..f0dc919762 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-database-design.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-database-design.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f180b6c005b0e76f08c
 title: Relational Database Design
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: AqdfbrpkbHk
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-databases-and-sqlite.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-databases-and-sqlite.english.md
index b942772da8..8f1ec890d8 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-databases-and-sqlite.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-databases-and-sqlite.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f170b6c005b0e76f08a
 title: 'Relational Databases and SQLite'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: QlNod5-kFpA
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-databases-join-operation.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-databases-join-operation.english.md
index b1c93d8c20..0305cdb9f2 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-databases-join-operation.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-databases-join-operation.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f180b6c005b0e76f08f
 title: 'Relational Databases: Join Operation'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: jvDw3D9GKac
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-databases-many-to-many-relationships.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-databases-many-to-many-relationships.english.md
index 4540179476..c66bb2b02d 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-databases-many-to-many-relationships.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-databases-many-to-many-relationships.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f190b6c005b0e76f090
 title: 'Relational Databases: Many-to-many Relationships'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: z-SBYcvEQOc
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-databases-relationship-building.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-databases-relationship-building.english.md
index 54418a9609..519abf5302 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-databases-relationship-building.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/relational-databases-relationship-building.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f180b6c005b0e76f08e
 title: 'Relational Databases: Relationship Building'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: CSbqczsHVnc
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/representing-relationships-in-a-relational-database.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/representing-relationships-in-a-relational-database.english.md
index 5b3ee4aa3e..ff0775a7e7 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/representing-relationships-in-a-relational-database.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/representing-relationships-in-a-relational-database.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f180b6c005b0e76f08d
 title: Representing Relationships in a Relational Database
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: -orenCNdC2Q
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/strings-and-lists.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/strings-and-lists.english.md
index 88eda5d680..db6f5edef1 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/strings-and-lists.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/strings-and-lists.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f090b6c005b0e76f066
 title: Strings and Lists
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: lxcFa7ldCi0
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/strings-in-python.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/strings-in-python.english.md
index c6e7e3718a..824e820f3a 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/strings-in-python.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/strings-in-python.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f070b6c005b0e76f060
 title: Strings in Python
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: LYZj207fKpQ
 ---
@@ -26,35 +26,35 @@ question:
   answers:
     - |
         n
-        
+
         n
     - |
         0
-        
+
         1
     - |
         0
-        
+
         1
-        
+
         2
-        
+
         3
-        
+
         4
-        
+
         5
     - |
         b
-        
+
         a
-        
+
         n
-        
+
         a
-        
+
         n
-    
+
         a
   solution: 4
 ```
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/the-tuples-collection.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/the-tuples-collection.english.md
index 9a9fb76567..2e1d9fb6bf 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/the-tuples-collection.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/the-tuples-collection.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f0a0b6c005b0e76f06c
 title: The Tuples Collection
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: 3Lxpladfh2k
 ---
@@ -30,27 +30,27 @@ question:
   answers:
     - |
         k i
-        
+
         k i
-        
+
         k i
     - |
         quincy 0
-        
+
         beau 1
-        
+
         kris 2
     - |
         quincy 1
-        
+
         beau 5
-        
+
         kris 9
     - |
         1 quincy
-        
+
         5 beau
-        
+
         9 kris
   solution: 3
 ```
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/using-web-services.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/using-web-services.english.md
index 0aa9f4edca..d48d5a80e7 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/using-web-services.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/using-web-services.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f0e0b6c005b0e76f07a
 title: Using Web Services
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: oNl1OVDPGKE
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/variables-expressions-and-statements.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/variables-expressions-and-statements.english.md
index 3963231d6c..c998e0c87d 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/variables-expressions-and-statements.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/variables-expressions-and-statements.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f050b6c005b0e76f056
 title: Variables, Expressions, and Statements
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: nELR-uyyrok
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/visualizing-data-with-python.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/visualizing-data-with-python.english.md
index 5ba8be5b63..16e00b5be8 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/visualizing-data-with-python.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/visualizing-data-with-python.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f690b6c005b0e76f095
 title: Visualizing Data with Python
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: e3lydkH0prw
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-api-rate-limiting-and-security.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-api-rate-limiting-and-security.english.md
index 1c26da1bc4..139a8ee51c 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-api-rate-limiting-and-security.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-api-rate-limiting-and-security.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f150b6c005b0e76f080
 title: 'Web Services: API Rate Limiting and Security'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: pI-g0lI8ngs
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-apis.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-apis.english.md
index b63081b666..7d57baafeb 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-apis.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-apis.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f150b6c005b0e76f07f
 title: 'Web Services: APIs'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: oUNn1psfBJg
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-json.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-json.english.md
index 2dc0372136..a67d91610c 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-json.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-json.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f140b6c005b0e76f07d
 title: 'Web Services: JSON'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: ZJE-U56BppM
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-service-oriented-approach.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-service-oriented-approach.english.md
index 6b851863ea..34bbd557fa 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-service-oriented-approach.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-service-oriented-approach.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f140b6c005b0e76f07e
 title: 'Web Services: Service Oriented Approach'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: muerlsCHExI
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-xml-schema.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-xml-schema.english.md
index 8e3eb9400d..35d6a281b7 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-xml-schema.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-xml-schema.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f0e0b6c005b0e76f07c
 title: 'Web Services: XML Schema'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: yWU9kTxW-nc
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-xml.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-xml.english.md
index fa0e824ab3..b66f8414a1 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-xml.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/web-services-xml.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f0e0b6c005b0e76f07b
 title: 'Web Services: XML'
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: _pZ0srbg7So
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/working-with-lists.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/working-with-lists.english.md
index 8c30d5b12e..7311366d36 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/working-with-lists.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/python-for-everybody/working-with-lists.english.md
@@ -2,7 +2,7 @@
 id: 5e7b9f090b6c005b0e76f065
 title: Working with Lists
 challengeType: 11
-isHidden: true
+isHidden: false
 isRequired: true
 videoId: lCnHfTHkhbE
 ---
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/arithmetic-formatter.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/arithmetic-formatter.english.md
index a6a8051ef1..1fe0fe73bd 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/arithmetic-formatter.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/arithmetic-formatter.english.md
@@ -2,7 +2,7 @@
 id: 5e44412c903586ffb414c94c
 title: Arithmetic Formatter
 challengeType: 10
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/budget-app.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/budget-app.english.md
index 34ddd64fe9..8b603e06cd 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/budget-app.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/budget-app.english.md
@@ -2,7 +2,7 @@
 id: 5e44413e903586ffb414c94e
 title: Budget App
 challengeType: 10
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/polygon-area-calculator.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/polygon-area-calculator.english.md
index 619370ed39..17d88f22bc 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/polygon-area-calculator.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/polygon-area-calculator.english.md
@@ -2,7 +2,7 @@
 id: 5e444147903586ffb414c94f
 title: Polygon Area Calculator
 challengeType: 10
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/probability-calculator.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/probability-calculator.english.md
index ceb8a93bb5..ac2cd5f5b4 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/probability-calculator.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/probability-calculator.english.md
@@ -2,7 +2,7 @@
 id: 5e44414f903586ffb414c950
 title: Probability Calculator
 challengeType: 10
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/time-calculator.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/time-calculator.english.md
index b90e02d641..598a74bdc3 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/time-calculator.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/scientific-computing-with-python-projects/time-calculator.english.md
@@ -2,7 +2,7 @@
 id: 5e444136903586ffb414c94d
 title: Time Calculator
 challengeType: 10
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-analysis-example-a.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-analysis-example-a.english.md
index d01eac7f9a..3101a5e4b5 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-analysis-example-a.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-analysis-example-a.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c14d
 title: Data Analysis Example A
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: nVAaxZ34khk
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-analysis-example-b.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-analysis-example-b.english.md
index ee35eb50e1..78b0a80cd4 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-analysis-example-b.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-analysis-example-b.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c14e
 title: Data Analysis Example B
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: 0kJz0q0pvgQ
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-and-visualizations.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-and-visualizations.english.md
index 9063dc4e48..0f89181e0e 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-and-visualizations.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-and-visualizations.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c160
 title: Data Cleaning and Visualizations
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: mHjxzFS5_Z0
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-duplicates.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-duplicates.english.md
index 6bb293d3a2..38df44bc04 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-duplicates.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-duplicates.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c15f
 title: Data Cleaning Duplicates
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: kj7QqjXhH6A
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-introduction.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-introduction.english.md
index 9d3c70b651..00e915a1af 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-introduction.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-introduction.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c15d
 title: Data Cleaning Introduction
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: ovYNhnltVxY
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-with-dataframes.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-with-dataframes.english.md
index 4be3b3f83f..a7d4262cb6 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-with-dataframes.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-with-dataframes.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c15e
 title: Data Cleaning with DataFrames
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: sTMN_pdI6S0
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/how-to-use-jupyter-notebooks-intro.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/how-to-use-jupyter-notebooks-intro.english.md
index 2bd89d90be..ec57fd740b 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/how-to-use-jupyter-notebooks-intro.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/how-to-use-jupyter-notebooks-intro.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c14f
 title: How to use Jupyter Notebooks Intro
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: h8caJq2Bb9w
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/introduction-to-data-analysis.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/introduction-to-data-analysis.english.md
index fd486822a1..5d080de699 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/introduction-to-data-analysis.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/introduction-to-data-analysis.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c14c
 title: Introduction to Data Analysis
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: VJrP2FUzKP0
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/jupyter-notebooks-cells.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/jupyter-notebooks-cells.english.md
index 7a2380d223..84e82ba266 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/jupyter-notebooks-cells.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/jupyter-notebooks-cells.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c150
 title: Jupyter Notebooks Cells
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: 5PPegAs9aLA
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/jupyter-notebooks-importing-and-exporting-data.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/jupyter-notebooks-importing-and-exporting-data.english.md
index 38b0a340dc..6552fe43d9 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/jupyter-notebooks-importing-and-exporting-data.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/jupyter-notebooks-importing-and-exporting-data.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c151
 title: Jupyter Notebooks Importing and Exporting Data
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: k1msxD3JIxE
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-algebra-and-size.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-algebra-and-size.english.md
index a3bcdfec1d..3d7021e86f 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-algebra-and-size.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-algebra-and-size.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c157
 title: Numpy Algebra and Size
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: XAT97YLOKD8
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-arrays.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-arrays.english.md
index 546de8101e..e80b159e66 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-arrays.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-arrays.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c154
 title: Numpy Arrays
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: VDYVFHBL1AM
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-boolean-arrays.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-boolean-arrays.english.md
index c4044109ba..9db6a4e71a 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-boolean-arrays.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-boolean-arrays.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c156
 title: Numpy Boolean Arrays
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: N1ttsMmcVMM
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-introduction-a.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-introduction-a.english.md
index b4c320cb13..9b194ac00f 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-introduction-a.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-introduction-a.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c152
 title: Numpy Introduction A
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: P-JjV6GBCmk
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-introduction-b.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-introduction-b.english.md
index e958bca3b1..c29bc26402 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-introduction-b.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-introduction-b.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c153
 title: Numpy Introduction B
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: YIqgrNLAZkA
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-operations.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-operations.english.md
index 8a0a18b33e..7e172cb9c6 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-operations.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-operations.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c155
 title: Numpy Operations
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: eqSVcJbaPdk
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-condtitional-selection-and-modifying-dataframes.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-condtitional-selection-and-modifying-dataframes.english.md
index 59093356bc..07afdd7e4e 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-condtitional-selection-and-modifying-dataframes.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-condtitional-selection-and-modifying-dataframes.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c15b
 title: Pandas Condtitional Selection and Modifying DataFrames
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: BFlH0fN5xRQ
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-creating-columns.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-creating-columns.english.md
index d9f10c8fa2..bddd74322e 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-creating-columns.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-creating-columns.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c15c
 title: Pandas Creating Columns
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: _sSo2XZoB3E
 ---
 
@@ -35,7 +35,7 @@ question:
     - |
       ```py
       certificates_earned['Certificates per month'] = round(
-          certificates_earned['Certificates'] / 
+          certificates_earned['Certificates'] /
           certificates_earned['Time (in months)']
       )
       ```
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-dataframes.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-dataframes.english.md
index c8ac7dc4c7..1dbbe8dbda 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-dataframes.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-dataframes.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c15a
 title: Pandas DataFrames
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: 7SgFBYXaiH0
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-indexing-and-conditional-selection.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-indexing-and-conditional-selection.english.md
index f7c6a62018..40d897f441 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-indexing-and-conditional-selection.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-indexing-and-conditional-selection.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c159
 title: Pandas Indexing and Conditional Selection
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: -ZOrgV_aA9A
 ---
 
@@ -22,7 +22,7 @@ question:
     import pandas as pd
 
     certificates_earned = pd.Series(
-        [8, 2, 5, 6], 
+        [8, 2, 5, 6],
         index=['Tom', 'Kris', 'Ahmad', 'Beau']
     )
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-introduction.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-introduction.english.md
index 7ac1f1522b..6b83b36c84 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-introduction.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-introduction.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c158
 title: Pandas Introduction
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: 0xACW-8cZU0
 ---
 
@@ -22,7 +22,7 @@ question:
     import pandas as pd
 
     certificates_earned = pd.Series(
-        [8, 2, 5, 6], 
+        [8, 2, 5, 6],
         index=['Tom', 'Kris', 'Ahmad', 'Beau']
     )
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/parsing-html-and-saving-data.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/parsing-html-and-saving-data.english.md
index 3c9e969149..912105c4d4 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/parsing-html-and-saving-data.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/parsing-html-and-saving-data.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c164
 title: Parsing HTML and Saving Data
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: bJaqnTWQmb0
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/python-functions-and-collections.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/python-functions-and-collections.english.md
index e569a07225..07211c2451 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/python-functions-and-collections.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/python-functions-and-collections.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c166
 title: Python Functions and Collections
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: NzpU17ZVlUw
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/python-introduction.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/python-introduction.english.md
index bef13c245a..0a8bb85fa2 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/python-introduction.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/python-introduction.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c165
 title: Python Introduction
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: PrQV9JkLhb4
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/python-iteration-and-modules.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/python-iteration-and-modules.english.md
index 1b465ffe9f..85bb609a20 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/python-iteration-and-modules.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/python-iteration-and-modules.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c167
 title: Python Iteration and Modules
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: XzosGWLafrY
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/reading-data-csv-and-txt.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/reading-data-csv-and-txt.english.md
index 66ac40ba89..a397c3f4de 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/reading-data-csv-and-txt.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/reading-data-csv-and-txt.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c162
 title: Reading Data CSV and TXT
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: ViGEv0zOzUk
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/reading-data-from-databases.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/reading-data-from-databases.english.md
index 7ee8c6e9d4..2a465a2dce 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/reading-data-from-databases.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/reading-data-from-databases.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c163
 title: Reading Data from Databases
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: MtgXS1MofRw
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/reading-data-introduction.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/reading-data-introduction.english.md
index c1522d9d2d..80ff17ffb8 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/reading-data-introduction.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/reading-data-introduction.english.md
@@ -2,7 +2,7 @@
 id: 5e9a093a74c4063ca6f7c161
 title: Reading Data Introduction
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: cDnt02BcHng
 ---
 
@@ -38,26 +38,26 @@ question:
             name, certs_num, months_num = values
             print(f"{name} earned {__C__} certificates in {months_num} months")
     ```
-  
+
   answers:
     - |
       A: `'certificates.csv'`
-      
-      B: `'-'` 
-      
+
+      B: `'-'`
+
       C: `values`
     - |
       A: `'certificates.csv'`
-      
+
       B: `'$'`
-      
+
       C: `certs_num`
     - |
-    
+
       A: `'certificates'`
-      
+
       B: `'$'`
-      
+
       C: `certs_num`
   solution: 2
 ```
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/demographic-data-analyzer.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/demographic-data-analyzer.english.md
index 704d1109c7..3ef8563e93 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/demographic-data-analyzer.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/demographic-data-analyzer.english.md
@@ -2,7 +2,7 @@
 id: 5e46f7e5ac417301a38fb929
 title: Demographic Data Analyzer
 challengeType: 10
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/mean-variance-standard-deviation-calculator.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/mean-variance-standard-deviation-calculator.english.md
index 251bdb1624..70106b1cfa 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/mean-variance-standard-deviation-calculator.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/mean-variance-standard-deviation-calculator.english.md
@@ -2,7 +2,7 @@
 id: 5e46f7e5ac417301a38fb928
 title: Mean-Variance-Standard Deviation Calculator
 challengeType: 10
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/medical-data-visualizer.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/medical-data-visualizer.english.md
index d16837e8f2..07ceed67b4 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/medical-data-visualizer.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/medical-data-visualizer.english.md
@@ -2,7 +2,7 @@
 id: 5e46f7f8ac417301a38fb92a
 title: Medical Data Visualizer
 challengeType: 10
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/page-view-time-series-visualizer.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/page-view-time-series-visualizer.english.md
index 60bed25a8c..8a1b64d0d2 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/page-view-time-series-visualizer.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/page-view-time-series-visualizer.english.md
@@ -2,7 +2,7 @@
 id: 5e46f802ac417301a38fb92b
 title: Page View Time Series Visualizer
 challengeType: 10
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/sea-level-predictor.english.md b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/sea-level-predictor.english.md
index 0baa580823..9dfa51db66 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/sea-level-predictor.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-projects/sea-level-predictor.english.md
@@ -2,7 +2,7 @@
 id: 5e4f5c4b570f7e3a4949899f
 title: Sea Level Predictor
 challengeType: 10
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/numpy/accessing-and-changing-elements,-rows,-columns.english.md b/curriculum/challenges/english/08-data-analysis-with-python/numpy/accessing-and-changing-elements,-rows,-columns.english.md
index 3eb18d70cc..3b3a79bb0d 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/numpy/accessing-and-changing-elements,-rows,-columns.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/numpy/accessing-and-changing-elements,-rows,-columns.english.md
@@ -2,7 +2,7 @@
 id: 5e9a0a8e09c5df3cc3600ed4
 title: Accessing and Changing Elements, Rows, Columns
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: v-7Y7koJ_N0
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/numpy/basics-of-numpy.english.md b/curriculum/challenges/english/08-data-analysis-with-python/numpy/basics-of-numpy.english.md
index b6dfb3247c..e33313e1b1 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/numpy/basics-of-numpy.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/numpy/basics-of-numpy.english.md
@@ -2,7 +2,7 @@
 id: 5e9a0a8e09c5df3cc3600ed3
 title: Basics of Numpy
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: f9QrZrKQMLI
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/numpy/copying-arrays-warning.english.md b/curriculum/challenges/english/08-data-analysis-with-python/numpy/copying-arrays-warning.english.md
index 71e33c2663..1f918e9200 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/numpy/copying-arrays-warning.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/numpy/copying-arrays-warning.english.md
@@ -2,7 +2,7 @@
 id: 5e9a0a8e09c5df3cc3600ed7
 title: Copying Arrays Warning
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: iIoQ0_L0GvA
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/numpy/initialize-array-problem.english.md b/curriculum/challenges/english/08-data-analysis-with-python/numpy/initialize-array-problem.english.md
index 5046acd512..b349ae4b4f 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/numpy/initialize-array-problem.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/numpy/initialize-array-problem.english.md
@@ -2,7 +2,7 @@
 id: 5e9a0a8e09c5df3cc3600ed6
 title: Initialize Array Problem
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: 0jGfH8BPfOk
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/numpy/initializing-different-arrays.english.md b/curriculum/challenges/english/08-data-analysis-with-python/numpy/initializing-different-arrays.english.md
index 964ac0e163..4257f169a2 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/numpy/initializing-different-arrays.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/numpy/initializing-different-arrays.english.md
@@ -2,7 +2,7 @@
 id: 5e9a0a8e09c5df3cc3600ed5
 title: Initializing Different Arrays
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: CEykdsKT4U4
 ---
 
@@ -17,7 +17,7 @@ videoId: CEykdsKT4U4
 question:
   text: |
     What will the following code print?:
-    
+
     ```py
     a = np.array([[1, 2, 3, 4, 5], [6, 7, 8, 9, 10]])
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/numpy/loading-data-and-advanced-indexing.english.md b/curriculum/challenges/english/08-data-analysis-with-python/numpy/loading-data-and-advanced-indexing.english.md
index f23e588917..9aa1bea5b0 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/numpy/loading-data-and-advanced-indexing.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/numpy/loading-data-and-advanced-indexing.english.md
@@ -2,7 +2,7 @@
 id: 5e9a0a8e09c5df3cc3600eda
 title: Loading Data and Advanced Indexing
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: tUdBZ7pF8Jg
 ---
 
@@ -28,7 +28,7 @@ question:
     ```py
     [29. 32. 45. 15.  5. 22.]
     ```
-  
+
   answers:
     - |
       ```
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/numpy/mathematics.english.md b/curriculum/challenges/english/08-data-analysis-with-python/numpy/mathematics.english.md
index d17e02de1c..d51afc1a47 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/numpy/mathematics.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/numpy/mathematics.english.md
@@ -2,7 +2,7 @@
 id: 5e9a0a8e09c5df3cc3600ed8
 title: Mathematics
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: 7txegvyhtVk
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/numpy/reorganizing-arrays.english.md b/curriculum/challenges/english/08-data-analysis-with-python/numpy/reorganizing-arrays.english.md
index 35e0b038c1..b5fdd479a4 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/numpy/reorganizing-arrays.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/numpy/reorganizing-arrays.english.md
@@ -2,7 +2,7 @@
 id: 5e9a0a8e09c5df3cc3600ed9
 title: Reorganizing Arrays
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: VNWAQbEM-C8
 ---
 
diff --git a/curriculum/challenges/english/08-data-analysis-with-python/numpy/what-is-numpy.english.md b/curriculum/challenges/english/08-data-analysis-with-python/numpy/what-is-numpy.english.md
index 805c55f55b..89a85673c5 100644
--- a/curriculum/challenges/english/08-data-analysis-with-python/numpy/what-is-numpy.english.md
+++ b/curriculum/challenges/english/08-data-analysis-with-python/numpy/what-is-numpy.english.md
@@ -2,7 +2,7 @@
 id: 5e9a0a8e09c5df3cc3600ed2
 title: What is NumPy
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: 5Nwfs5Ej85Q
 ---
 
diff --git a/curriculum/challenges/english/09-information-security/information-security-projects/port-scanner.english.md b/curriculum/challenges/english/09-information-security/information-security-projects/port-scanner.english.md
index ab2a326fb2..fcfc11549b 100644
--- a/curriculum/challenges/english/09-information-security/information-security-projects/port-scanner.english.md
+++ b/curriculum/challenges/english/09-information-security/information-security-projects/port-scanner.english.md
@@ -2,7 +2,7 @@
 id: 5e46f979ac417301a38fb932
 title: Port Scanner
 challengeType: 10
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/09-information-security/information-security-projects/secure-real-time-multiplayer-game.english.md b/curriculum/challenges/english/09-information-security/information-security-projects/secure-real-time-multiplayer-game.english.md
index 52e48e43c1..e3ac81c6c5 100644
--- a/curriculum/challenges/english/09-information-security/information-security-projects/secure-real-time-multiplayer-game.english.md
+++ b/curriculum/challenges/english/09-information-security/information-security-projects/secure-real-time-multiplayer-game.english.md
@@ -2,7 +2,7 @@
 id: 5e601c775ac9d0ecd8b94aff
 title: Secure Real Time Multiplayer Game
 challengeType: 4
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/09-information-security/information-security-projects/sha-1-password-cracker.english.md b/curriculum/challenges/english/09-information-security/information-security-projects/sha-1-password-cracker.english.md
index cd47ca80bb..1a279c0ba4 100644
--- a/curriculum/challenges/english/09-information-security/information-security-projects/sha-1-password-cracker.english.md
+++ b/curriculum/challenges/english/09-information-security/information-security-projects/sha-1-password-cracker.english.md
@@ -2,7 +2,7 @@
 id: 5e46f983ac417301a38fb933
 title: SHA-1 Password Cracker
 challengeType: 10
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/09-information-security/python-for-penetration-testing/creating-a-tcp-client.english.md b/curriculum/challenges/english/09-information-security/python-for-penetration-testing/creating-a-tcp-client.english.md
index db433c81b2..d8cb4ebf2b 100644
--- a/curriculum/challenges/english/09-information-security/python-for-penetration-testing/creating-a-tcp-client.english.md
+++ b/curriculum/challenges/english/09-information-security/python-for-penetration-testing/creating-a-tcp-client.english.md
@@ -2,7 +2,7 @@
 id: 5ea9997bbec2e9bc47e94db0
 title: Creating a TCP Client
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: ugYfJNTawks
 ---
 
diff --git a/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-a-banner-grabber.english.md b/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-a-banner-grabber.english.md
index 0bf1461f4d..5fad0f3d79 100644
--- a/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-a-banner-grabber.english.md
+++ b/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-a-banner-grabber.english.md
@@ -2,7 +2,7 @@
 id: 5ea9997bbec2e9bc47e94db3
 title: Developing a Banner Grabber
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: CeGW761BIsA
 ---
 
@@ -28,15 +28,15 @@ question:
   answers:
     - |
       A: `connect`
-      
+
       B: `port`
     - |
       A: `getsockname`
-      
+
       B: `'1-1024'`
     - |
       A: `connect`
-      
+
       B: `int(port)`
   solution: 3
 ```
diff --git a/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-a-port-scanner.english.md b/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-a-port-scanner.english.md
index f720fade99..8898bda913 100644
--- a/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-a-port-scanner.english.md
+++ b/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-a-port-scanner.english.md
@@ -2,7 +2,7 @@
 id: 5ea9997bbec2e9bc47e94db4
 title: Developing a Port Scanner
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: z_qkqZS7KZ4
 ---
 
diff --git a/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-an-nmap-scanner-part-1.english.md b/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-an-nmap-scanner-part-1.english.md
index 4698a90fd2..8feb029404 100644
--- a/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-an-nmap-scanner-part-1.english.md
+++ b/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-an-nmap-scanner-part-1.english.md
@@ -2,7 +2,7 @@
 id: 5ea9997bbec2e9bc47e94db1
 title: Developing an Nmap Scanner part 1
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: jYk9XaGoAnk
 ---
 
diff --git a/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-an-nmap-scanner-part-2.english.md b/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-an-nmap-scanner-part-2.english.md
index 58a8357789..87a10e5f23 100644
--- a/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-an-nmap-scanner-part-2.english.md
+++ b/curriculum/challenges/english/09-information-security/python-for-penetration-testing/developing-an-nmap-scanner-part-2.english.md
@@ -2,7 +2,7 @@
 id: 5ea9997bbec2e9bc47e94db2
 title: Developing an Nmap Scanner part 2
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: a98PscnUsTg
 ---
 
diff --git a/curriculum/challenges/english/09-information-security/python-for-penetration-testing/introduction-and-setup.english.md b/curriculum/challenges/english/09-information-security/python-for-penetration-testing/introduction-and-setup.english.md
index 0d64453214..fa6dc5bf4d 100644
--- a/curriculum/challenges/english/09-information-security/python-for-penetration-testing/introduction-and-setup.english.md
+++ b/curriculum/challenges/english/09-information-security/python-for-penetration-testing/introduction-and-setup.english.md
@@ -2,7 +2,7 @@
 id: 5ea9997bbec2e9bc47e94dae
 title: Introduction and Setup
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: XeQ7ZKtb998
 ---
 
diff --git a/curriculum/challenges/english/09-information-security/python-for-penetration-testing/understanding-sockets-and-creating-a-tcp-server.english.md b/curriculum/challenges/english/09-information-security/python-for-penetration-testing/understanding-sockets-and-creating-a-tcp-server.english.md
index 198977057f..59b082a146 100644
--- a/curriculum/challenges/english/09-information-security/python-for-penetration-testing/understanding-sockets-and-creating-a-tcp-server.english.md
+++ b/curriculum/challenges/english/09-information-security/python-for-penetration-testing/understanding-sockets-and-creating-a-tcp-server.english.md
@@ -2,7 +2,7 @@
 id: 5ea9997bbec2e9bc47e94daf
 title: Understanding Sockets and Creating a TCP Server
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: F1QI9tNuDQg
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/how-neural-networks-work/deep-learning-demystified.english.md b/curriculum/challenges/english/11-machine-learning-with-python/how-neural-networks-work/deep-learning-demystified.english.md
index 073cc9d1ed..79ff98a793 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/how-neural-networks-work/deep-learning-demystified.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/how-neural-networks-work/deep-learning-demystified.english.md
@@ -2,7 +2,7 @@
 id: 5e9a0e9ef99a403d019610cc
 title: Deep Learning Demystified
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: bejQ-W9BGJg
 ---
 
@@ -16,7 +16,7 @@ videoId: bejQ-W9BGJg
 ```yml
 question:
   text: How should you assign weights to input neurons before training your network for the first time?
-  
+
   answers:
     - From smallest to largest.
     - Completely randomly.
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/how-neural-networks-work/how-convolutional-neural-networks-work.english.md b/curriculum/challenges/english/11-machine-learning-with-python/how-neural-networks-work/how-convolutional-neural-networks-work.english.md
index 87cabdf1b5..cd03b69043 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/how-neural-networks-work/how-convolutional-neural-networks-work.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/how-neural-networks-work/how-convolutional-neural-networks-work.english.md
@@ -2,7 +2,7 @@
 id: 5e9a0e9ef99a403d019610cd
 title: How Convolutional Neural Networks work
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: Y5M7KH4A4n4
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/how-neural-networks-work/how-deep-neural-networks-work.english.md b/curriculum/challenges/english/11-machine-learning-with-python/how-neural-networks-work/how-deep-neural-networks-work.english.md
index 37c4068f2d..6c0ef66fe7 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/how-neural-networks-work/how-deep-neural-networks-work.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/how-neural-networks-work/how-deep-neural-networks-work.english.md
@@ -2,7 +2,7 @@
 id: 5e9a0e9ef99a403d019610ca
 title: How Deep Neural Networks Work
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: zvalnHWGtx4
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/how-neural-networks-work/recurrent-neural-networks-rnn-and-long-short-term-memory-lstm.english.md b/curriculum/challenges/english/11-machine-learning-with-python/how-neural-networks-work/recurrent-neural-networks-rnn-and-long-short-term-memory-lstm.english.md
index 0676ffa2c8..4a22fbc682 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/how-neural-networks-work/recurrent-neural-networks-rnn-and-long-short-term-memory-lstm.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/how-neural-networks-work/recurrent-neural-networks-rnn-and-long-short-term-memory-lstm.english.md
@@ -2,7 +2,7 @@
 id: 5e9a0e9ef99a403d019610cb
 title: Recurrent Neural Networks RNN and Long Short Term Memory LSTM
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: UVimlsy9eW0
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/book-recommendation-engine-using-knn.english.md b/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/book-recommendation-engine-using-knn.english.md
index 59779832aa..910a14ba11 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/book-recommendation-engine-using-knn.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/book-recommendation-engine-using-knn.english.md
@@ -2,7 +2,7 @@
 id: 5e46f8e3ac417301a38fb92f
 title: Book Recommendation Engine using KNN
 challengeType: 10
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/cat-and-dog-image-classifier.english.md b/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/cat-and-dog-image-classifier.english.md
index 273a984ff2..d35df18aee 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/cat-and-dog-image-classifier.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/cat-and-dog-image-classifier.english.md
@@ -2,7 +2,7 @@
 id: 5e46f8dcac417301a38fb92e
 title: Cat and Dog Image Classifier
 challengeType: 10
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/linear-regression-health-costs-calculator.english.md b/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/linear-regression-health-costs-calculator.english.md
index 79c548be10..3f335d4aab 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/linear-regression-health-costs-calculator.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/linear-regression-health-costs-calculator.english.md
@@ -2,7 +2,7 @@
 id: 5e46f8edac417301a38fb930
 title: Linear Regression Health Costs Calculator
 challengeType: 10
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/neural-network-sms-text-classifier.md b/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/neural-network-sms-text-classifier.md
index 21d3b3248b..76d35ff978 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/neural-network-sms-text-classifier.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/neural-network-sms-text-classifier.md
@@ -2,7 +2,7 @@
 id: 5e46f8edac417301a38fb931
 title: Neural Network SMS Text Classifier
 challengeType: 10
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/rock-paper-scissors.english.md b/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/rock-paper-scissors.english.md
index c293bb2bb1..7132a34815 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/rock-paper-scissors.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/rock-paper-scissors.english.md
@@ -2,7 +2,7 @@
 id: 5e46f8d6ac417301a38fb92d
 title: Rock Paper Scissors
 challengeType: 10
-isHidden: true
+isHidden: false
 isRequired: true
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/conclusion.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/conclusion.english.md
index 48effe2587..863803d536 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/conclusion.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/conclusion.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72da6
 title: Conclusion
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: LMNub5frQi4
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/convolutional-neural-networks-evaluating-the-model.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/convolutional-neural-networks-evaluating-the-model.english.md
index 33e45f268d..94edb00096 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/convolutional-neural-networks-evaluating-the-model.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/convolutional-neural-networks-evaluating-the-model.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d99
 title: 'Convolutional Neural Networks: Evaluating the Model'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: eCATNvwraXg
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/convolutional-neural-networks-picking-a-pretrained-model.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/convolutional-neural-networks-picking-a-pretrained-model.english.md
index 58c7774390..2b4e8b7d89 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/convolutional-neural-networks-picking-a-pretrained-model.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/convolutional-neural-networks-picking-a-pretrained-model.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d9a
 title: 'Convolutional Neural Networks: Picking a Pretrained Model'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: h1XUt1AgIOI
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/convolutional-neural-networks-the-convolutional-layer.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/convolutional-neural-networks-the-convolutional-layer.english.md
index ef545de5c8..05188ddc39 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/convolutional-neural-networks-the-convolutional-layer.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/convolutional-neural-networks-the-convolutional-layer.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d97
 title: 'Convolutional Neural Networks: The Convolutional Layer'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: LrdmcQpTyLw
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/convolutional-neural-networks.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/convolutional-neural-networks.english.md
index f1f868ad97..f77e08cf89 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/convolutional-neural-networks.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/convolutional-neural-networks.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d96
 title: Convolutional Neural Networks
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: _1kTP7uoU9E
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-building-the-model.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-building-the-model.english.md
index 561ced2446..c4426ee530 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-building-the-model.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-building-the-model.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d8e
 title: 'Core Learning Algorithms: Building the Model'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: 5wHw8BTd2ZQ
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-classification.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-classification.english.md
index bc9ea4c08b..bedd149146 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-classification.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-classification.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d8d
 title: 'Core Learning Algorithms: Classification'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: qFF7ZQNvK9E
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-clustering.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-clustering.english.md
index 80bb5be6fd..dc60704c2e 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-clustering.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-clustering.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d8f
 title: 'Core Learning Algorithms: Clustering'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: 8sqIaHc9Cz4
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-hidden-markov-models.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-hidden-markov-models.english.md
index 5718c9ed9d..2a0ce1d4e5 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-hidden-markov-models.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-hidden-markov-models.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d90
 title: 'Core Learning Algorithms: Hidden Markov Models'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: IZg24y4wEPY
 ---
 
@@ -19,7 +19,7 @@ question:
   answers:
     - It uses probability distributions to predict future events or states.
     - It analyzes the relationship between independent and dependent variables to make predictions.
-    - It separates data points into separate categories. 
+    - It separates data points into separate categories.
   solution: 1
 ```
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-the-training-process.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-the-training-process.english.md
index e95cc11c9d..49741080a2 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-the-training-process.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-the-training-process.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d8c
 title: 'Core Learning Algorithms: The Training Process'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: _cEwvqVoBhI
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-training-and-testing-data.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-training-and-testing-data.english.md
index 1fbb38d6bb..8948d982cc 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-training-and-testing-data.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-training-and-testing-data.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d8b
 title: 'Core Learning Algorithms: Training and Testing Data'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: wz9J1slsi7I
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-using-probabilities-to-make-predictions.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-using-probabilities-to-make-predictions.english.md
index 7094d33681..aca336b502 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-using-probabilities-to-make-predictions.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-using-probabilities-to-make-predictions.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d91
 title: 'Core Learning Algorithms: Using Probabilities to make Predictions'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: fYAYvLUawnc
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-working-with-data.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-working-with-data.english.md
index 7a7462bb68..465d0465e9 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-working-with-data.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms-working-with-data.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d8a
 title: 'Core Learning Algorithms: Working with Data'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: u85IOSsJsPI
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms.english.md
index ebd01e091e..36af40ce3a 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/core-learning-algorithms.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d89
 title: Core Learning Algorithms
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: u5lZURgcWnU
 ---
 
@@ -16,8 +16,8 @@ videoId: u5lZURgcWnU
 ```yml
 question:
   text: |
-    Which type of analysis would be best suited for the following problem?: 
-    
+    Which type of analysis would be best suited for the following problem?:
+
     You have the average temperature in the month of March for the last 100 years. Using this data, you want to predict the average temperature in the month of March 5 years from now.
   answers:
     - Multiple regression
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/creating-a-convolutional-neural-network.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/creating-a-convolutional-neural-network.english.md
index 8053db620c..8065880df8 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/creating-a-convolutional-neural-network.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/creating-a-convolutional-neural-network.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d98
 title: Creating a Convolutional Neural Network
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: kfv0K8MtkIc
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/introduction-machine-learning-fundamentals.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/introduction-machine-learning-fundamentals.english.md
index 23e0a45b6b..dc58c7c64b 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/introduction-machine-learning-fundamentals.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/introduction-machine-learning-fundamentals.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d87
 title: "Introduction: Machine Learning Fundamentals"
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: KwL1qTR5MT8
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/introduction-to-tensorflow.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/introduction-to-tensorflow.english.md
index eb217fb2bf..6955feb0a6 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/introduction-to-tensorflow.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/introduction-to-tensorflow.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d88
 title: Introduction to TensorFlow
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: r9hRyGGjOgQ
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-building-the-model.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-building-the-model.english.md
index 49f9d25cda..41288257f1 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-building-the-model.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-building-the-model.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72da1
 title: 'Natural Language Processing With RNNs: Building the Model'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: 32WBFS7lfsw
 ---
 
@@ -22,7 +22,7 @@ question:
     def build_mode(vocab_size, embedding_dim, rnn_units, batch_size):
         model = tf.keras.Sequential([
             tf.keras.layers.Embedding(vocab_size,
-                                      embedding_dim, 
+                                      embedding_dim,
                                       batch_input_shape=[batch_size, None]),
             tf.keras.layers.__A__(rnn_units,
                                   return_sequences=__B__,
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-create-a-play-generator.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-create-a-play-generator.english.md
index f5056c6578..c29d2c646b 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-create-a-play-generator.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-create-a-play-generator.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72da0
 title: 'Natural Language Processing With RNNs: Create a Play Generator'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: j5xsxjq_Xk8
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-making-predictions.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-making-predictions.english.md
index 47ac3bdcd1..d22a6bf114 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-making-predictions.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-making-predictions.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d9f
 title: 'Natural Language Processing With RNNs: Making Predictions'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: WO1hINnBj20
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-part-2.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-part-2.english.md
index 9da6acc2ff..1f819fba4f 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-part-2.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-part-2.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d9c
 title: 'Natural Language Processing With RNNs: Part 2'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: mUU9YXOFbZg
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-recurring-neural-networks.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-recurring-neural-networks.english.md
index 03da6300b9..cef4098eba 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-recurring-neural-networks.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-recurring-neural-networks.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d9d
 title: 'Natural Language Processing With RNNs: Recurring Neural Networks'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: bX5681NPOcA
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-sentimental-analysis.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-sentimental-analysis.english.md
index 5ea6490d0c..01ddbad25e 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-sentimental-analysis.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-sentimental-analysis.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d9e
 title: 'Natural Language Processing With RNNs: Sentiment Analysis'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: lYeLtu8Nq7c
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-training-the-model.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-training-the-model.english.md
index ddf08af829..3889d51ce1 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-training-the-model.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns-training-the-model.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72da2
 title: 'Natural Language Processing With RNNs: Training the Model'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: hEUiK7j9UI8
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns.english.md
index cd64e12c52..ba3e31693a 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/natural-language-processing-with-rnns.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d9b
 title: Natural Language Processing With RNNs
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: ZyCaF5S-lKg
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/neural-networks-activation-functions.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/neural-networks-activation-functions.english.md
index 2b18031b3b..290ede12a1 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/neural-networks-activation-functions.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/neural-networks-activation-functions.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d93
 title: 'Neural Networks: Activation Functions'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: S45tqW6BqRs
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/neural-networks-creating-a-model.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/neural-networks-creating-a-model.english.md
index 85223466d6..719118cc57 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/neural-networks-creating-a-model.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/neural-networks-creating-a-model.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d95
 title: 'Neural Networks: Creating a Model'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: K8bz1bmOCTw
 ---
 
@@ -29,21 +29,21 @@ question:
   answers:
     - |
       A: `keras`
-      
+
       B: `Sequential`
-      
+
       C: `Dense`
     - |
       A: `tf`
-      
+
       B: `Sequential`
-      
+
       C: `Categorical`
     - |
       A: `keras`
-      
+
       B: `sequential`
-      
+
       C: `dense`
   solution: 1
 ```
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/neural-networks-optimizers.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/neural-networks-optimizers.english.md
index 50cb41516f..c3acb02e26 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/neural-networks-optimizers.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/neural-networks-optimizers.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d94
 title: 'Neural Networks: Optimizers'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: hdOtRPQe1o4
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/neural-networks-with-tensorflow.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/neural-networks-with-tensorflow.english.md
index a865427f80..601e1ec22f 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/neural-networks-with-tensorflow.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/neural-networks-with-tensorflow.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72d92
 title: Neural Networks with TensorFlow
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: uisdfrNrZW4
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/reinforcement-learning-with-q-learning-example.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/reinforcement-learning-with-q-learning-example.english.md
index 3208bee952..599cdf9e55 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/reinforcement-learning-with-q-learning-example.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/reinforcement-learning-with-q-learning-example.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72da5
 title: 'Reinforcement Learning With Q-Learning: Example'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: RBBSNta234s
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/reinforcement-learning-with-q-learning-part-2.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/reinforcement-learning-with-q-learning-part-2.english.md
index c31f36d134..7c0b5810e5 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/reinforcement-learning-with-q-learning-part-2.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/reinforcement-learning-with-q-learning-part-2.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72da4
 title: 'Reinforcement Learning With Q-Learning: Part 2'
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: DX7hJuaUZ7o
 ---
 
diff --git a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/reinforcement-learning-with-q-learning.english.md b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/reinforcement-learning-with-q-learning.english.md
index 5b4bac3d2b..b7234fb088 100644
--- a/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/reinforcement-learning-with-q-learning.english.md
+++ b/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/reinforcement-learning-with-q-learning.english.md
@@ -2,7 +2,7 @@
 id: 5e8f2f13c4cdbe86b5c72da3
 title: Reinforcement Learning With Q-Learning
 challengeType: 11
-isHidden: true
+isHidden: false
 videoId: Cf7DSU0gVb4
 ---
 
diff --git a/curriculum/challenges/english/12-certificates/data-analysis-with-python-certificate/data-analysis-with-python-certificate.english.md b/curriculum/challenges/english/12-certificates/data-analysis-with-python-certificate/data-analysis-with-python-certificate.english.md
index 69e6eceb8c..209ea72f81 100644
--- a/curriculum/challenges/english/12-certificates/data-analysis-with-python-certificate/data-analysis-with-python-certificate.english.md
+++ b/curriculum/challenges/english/12-certificates/data-analysis-with-python-certificate/data-analysis-with-python-certificate.english.md
@@ -2,7 +2,7 @@
 id: 5e46fc95ac417301a38fb934
 title: Data Analysis with Python Certificate
 challengeType: 7
-isHidden: true
+isHidden: false
 isPrivate: true
 ---
 
diff --git a/curriculum/challenges/english/12-certificates/information-security-certificate/information-security-certificate.english.md b/curriculum/challenges/english/12-certificates/information-security-certificate/information-security-certificate.english.md
index 87eb6b8931..02b89a7ddb 100644
--- a/curriculum/challenges/english/12-certificates/information-security-certificate/information-security-certificate.english.md
+++ b/curriculum/challenges/english/12-certificates/information-security-certificate/information-security-certificate.english.md
@@ -2,7 +2,7 @@
 id: 5e6021435ac9d0ecd8b94b00
 title: Information Security Certificate
 challengeType: 7
-isHidden: true
+isHidden: false
 isPrivate: true
 ---
 
diff --git a/curriculum/challenges/english/12-certificates/machine-learning-with-python-certificate/machine-learning-with-python-certificate.english.md b/curriculum/challenges/english/12-certificates/machine-learning-with-python-certificate/machine-learning-with-python-certificate.english.md
index dbe21295bb..2ae47d5758 100644
--- a/curriculum/challenges/english/12-certificates/machine-learning-with-python-certificate/machine-learning-with-python-certificate.english.md
+++ b/curriculum/challenges/english/12-certificates/machine-learning-with-python-certificate/machine-learning-with-python-certificate.english.md
@@ -2,7 +2,7 @@
 id: 5e46fc95ac417301a38fb935
 title: Machine Learning with Python Certificate
 challengeType: 7
-isHidden: true
+isHidden: false
 isPrivate: true
 ---
 
diff --git a/curriculum/challenges/english/12-certificates/quality-assurance-certificate/quality-assurance-certificate.english.md b/curriculum/challenges/english/12-certificates/quality-assurance-certificate/quality-assurance-certificate.english.md
index 1915fb304c..764da11688 100644
--- a/curriculum/challenges/english/12-certificates/quality-assurance-certificate/quality-assurance-certificate.english.md
+++ b/curriculum/challenges/english/12-certificates/quality-assurance-certificate/quality-assurance-certificate.english.md
@@ -2,7 +2,7 @@
 id: 5e611829481575a52dc59c0e
 title: Quality Assurance Certificate
 challengeType: 7
-isHidden: true
+isHidden: false
 isPrivate: true
 ---
 
diff --git a/curriculum/challenges/english/12-certificates/scientific-computing-with-python-certificate/scientific-computing-with-python-certificate.english.md b/curriculum/challenges/english/12-certificates/scientific-computing-with-python-certificate/scientific-computing-with-python-certificate.english.md
index 9789860a76..2242416467 100644
--- a/curriculum/challenges/english/12-certificates/scientific-computing-with-python-certificate/scientific-computing-with-python-certificate.english.md
+++ b/curriculum/challenges/english/12-certificates/scientific-computing-with-python-certificate/scientific-computing-with-python-certificate.english.md
@@ -2,7 +2,7 @@
 id: 5e44431b903586ffb414c951
 title: Scientific Computing with Python Certificate
 challengeType: 7
-isHidden: true
+isHidden: false
 isPrivate: true
 ---