diff --git a/seed/challenges/basic-javascript.json b/seed/challenges/basic-javascript.json
index 5e2738d840..67928f9090 100644
--- a/seed/challenges/basic-javascript.json
+++ b/seed/challenges/basic-javascript.json
@@ -421,17 +421,17 @@
       "difficulty": "9.9816",
       "description": [
         "With JavaScript <code>array</code> variables, we can store several pieces of data in one place.",
-        "You start an array declaration with an opening bracket, end it with a closing bracket, and put a comma between each entry, like this: <code>var sandwich = [\"peanut butter\", \"jelly\", \"bread\"]</code>.",
+        "You start an array declaration with an opening square bracket, end it with a closing square bracket, and put a comma between each entry, like this: <code>var sandwich = [\"peanut butter\", \"jelly\", \"bread\"]</code>.",
         "Now let's create a new array called <code>myArray</code> that contains both a <code>string</code> and a <code>number</code> (in that order).",
         "Refer to the comments if you get stuck."
       ],
       "tests": [
-        "assert(typeof(myArray) == 'object', 'myArray should be an array');",
-        "assert(typeof(myArray[0]) !== 'undefined' && typeof(myArray[0]) == 'string', 'The first item in myArray should be a string');",
-        "assert(typeof(myArray[1]) !== 'undefined' && typeof(myArray[1]) == 'number', 'The second item in myArray should be a number');"
+        "assert(typeof(myArray) == 'object', '<code>myArray</code> should be an <code>array</code>.');",
+        "assert(typeof(myArray[0]) !== 'undefined' && typeof(myArray[0]) == 'string', 'The first item in <code>myArray</code> should be a <code>string</code>.');",
+        "assert(typeof(myArray[1]) !== 'undefined' && typeof(myArray[1]) == 'number', 'The second item in <code>myArray</code> should be a <code>number</code>.');"
       ],
       "challengeSeed": [
-        "//var array = [\"John\", 23];",
+        "// var array = [\"John\", 23];",
         "",
         "// Only change code below this line.",
         "",
@@ -484,11 +484,11 @@
         "Create a variable called <code>myData</code> and set it to equal the first value of <code>myArray</code>."
       ],
       "tests":[
-        "assert((function(){if(typeof(myArray) != 'undefined' && typeof(myData) != 'undefined' && myArray[0] == myData){return true;}else{return false;}})(), 'The variable <code>myData</code> should equal the first value of myArray');"
+        "assert((function(){if(typeof(myArray) != 'undefined' && typeof(myData) != 'undefined' && myArray[0] == myData){return true;}else{return false;}})(), 'The variable <code>myData</code> should equal the first value of <code>myArray</code>.');"
       ],
       "challengeSeed":[
-        "//var ourArray = [1,2,3];",
-        "//var ourData = ourArray[0]; // equals 1",
+        "// var ourArray = [1,2,3];",
+        "// var ourData = ourArray[0]; // equals 1",
         "",
         "var myArray = [1,2,3];",
         "// Only change code below this line.",
@@ -514,8 +514,8 @@
         "Now modify the data stored at index 0 of <code>myArray</code> to the value of 3."
       ],
       "tests":[
-        "assert((function(){if(typeof(myArray) != 'undefined' && myArray[0] == 3 && myArray[1] == 2 && myArray[2] == 3){return true;}else{return false;}})(), 'myArray should now be [3,2,3]');",
-        "assert((function(){if(editor.getValue().match(/myArray\\[0\\]\\s?=\\s?/g)){return true;}else{return false;}})(), 'You should be using correct index to modify the value in myArray');"
+        "assert((function(){if(typeof(myArray) != 'undefined' && myArray[0] == 3 && myArray[1] == 2 && myArray[2] == 3){return true;}else{return false;}})(), '<code>myArray</code> should now be [3,2,3].');",
+        "assert((function(){if(editor.getValue().match(/myArray\\[0\\]\\s?=\\s?/g)){return true;}else{return false;}})(), 'You should be using correct index to modify the value in <code>myArray</code>.');"
       ],
       "challengeSeed":[
         "var ourArray = [1,2,3];",
@@ -541,18 +541,18 @@
         "Another way to change the data in an array is with the <code>.pop()</code> function.",
         "<code>.pop()</code>is used to \"pop\" a value off of the end of an array. We can retrieve this value by performing <code>pop()</code> in a variable declaration.",
         "Any type of variable can be \"popped\" off of an array.",
-        "Use the <code>.pop()</code> function to remove the last item from myArray."
+        "Use the <code>.pop()</code> function to remove the last item from <code>myArray</code>."
       ],
       "tests": [
-        "assert((function(d){if(d[0] == 'John' && d[1] == 23 && d[2] == undefined){return true;}else{return false;}})(myArray), 'myArray should only have the first two values left([\"John\", 23])');",
-        "assert((function(d){if(d[0] == 'cat' && d[1] == 2 && d[2] == undefined){return true;}else{return false;}})(removed), 'myArray should only have the first two values left([\"cat\"], 2)');"
+        "assert((function(d){if(d[0] == 'John' && d[1] == 23 && d[2] == undefined){return true;}else{return false;}})(myArray), '<code>myArray</code> should only have the first two values left([\"John\", 23]).');",
+        "assert((function(d){if(d[0] == 'cat' && d[1] == 2 && d[2] == undefined){return true;}else{return false;}})(removed), '<code>removed</code> should only have the first two values left([\"cat\"], 2).');"
       ],
       "challengeSeed": [
-        "//var numbers = [1,2,3];",
-        "//console.log(numbers); // logs [1,2,3]",
-        "//var removed = numbers.pop();",
-        "//console.log(numbers); // logs [1,2]",
-        "//console.log(removed); // logs 3",
+        "// var numbers = [1,2,3];",
+        "// console.log(numbers); // logs [1,2,3]",
+        "// var removed = numbers.pop();",
+        "// console.log(numbers); // logs [1,2]",
+        "// console.log(removed); // logs 3",
         "",
         "var myArray = [\"John\", 23, [\"cat\", 2]];",
         "// Only change code below this line.",
@@ -573,20 +573,20 @@
       "difficulty": "9.9818",
       "description": [
         "Not only can you <code>pop()</code> data off of the end of an array, you can also <code>push()</code> data onto the end of an array.",
-        "Take the myArray array and <code>push()</code> this value to the end of it: <code>[\"dog\", 3]</code>."
+        "Take the <code>myArray</code> array and <code>push()</code> this value to the end of it: <code>[\"dog\", 3]</code>."
       ],
       "tests": [
-        "assert((function(d){if(d[2] != undefined && d[0] == 'John' && d[1] == 23 && d[2][0] == 'dog' && d[2][1] == 3 && d[2].length == 2){return true;}else{return false;}})(myArray), 'myArray should only have the first two values left([\"John\", 23, [\"dog\", 3]])');"
+        "assert((function(d){if(d[2] != undefined && d[0] == 'John' && d[1] == 23 && d[2][0] == 'dog' && d[2][1] == 3 && d[2].length == 2){return true;}else{return false;}})(myArray), '<code>myArray</code> should only have the first two values left([\"John\", 23, [\"dog\", 3]]).');"
       ],
       "challengeSeed": [
         "var ourArray = [\"Stimpson\", \"J\", [\"cat\"]];",
         "ourArray.pop();",
         "ourArray.push([\"happy\", \"joy\"]);",
-        "// ourArray now equals [\"Stimpson\", \"J\", [\"happy\", \"joy\"]]",
+        "// ourArray now equals [\"Stimpson\", \"J\", [\"happy\", \"joy\"]].",
         "",
         "var myArray = [\"John\", 23, [\"cat\", 2]];",
         "myArray.pop();",
-        "//Add a [\"dog\", 3] to the end of myArray using push()",
+        "// Add a [\"dog\", 3] to the end of myArray using push().",
         "// Only change code below this line.",
         "",
         "",
@@ -604,21 +604,21 @@
       "difficulty": "9.9817",
       "description": [
         "<code>pop()</code> always removes the last element of an array. What if you want to remove the first? That's where <code>.shift()</code> comes in.",
-        "Take the myArray array and <code>shift()</code> the first value off of it.  Set <code>myRemoved</code> to the first value of <code>myArray</code> using <code>shift()</code>."
+        "Take the <code>myArray</code> array and <code>shift()</code> the first value off of it. Set <code>myRemoved</code> to the first value of <code>myArray</code> using <code>shift()</code>."
       ],
       "tests": [
-        "assert((function(d){if(d[0] == 23 && d[1][0] == 'dog' && d[1][1] == 3 && d[2] == undefined){return true;}else{return false;}})(myArray), 'myArray should only have the last two values left([23, [\"dog\", 3]])');",
-        "assert((function(d){if(d === 'John' && typeof(myRemoved) === 'string'){return true;}else{return false;}})(myRemoved), 'myRemoved should contain \"John\"');"
+        "assert((function(d){if(d[0] == 23 && d[1][0] == 'dog' && d[1][1] == 3 && d[2] == undefined){return true;}else{return false;}})(myArray), '<code>myArray</code> should only have the last two values left([23, [\"dog\", 3]]).');",
+        "assert((function(d){if(d === 'John' && typeof(myRemoved) === 'string'){return true;}else{return false;}})(myRemoved), '<code>myRemoved</code> should contain <code>\"John\"</code>.');"
       ],
       "challengeSeed": [
         "var ourArray = [\"Stimpson\", \"J\", [\"cat\"]];",
         "ourRemoved = ourArray.shift();",
-        "// ourArray now equals [\"J\", [\"cat\"]]",
+        "// ourArray now equals [\"J\", [\"cat\"]].",
         "",
         "var myArray = [\"John\", 23, [\"dog\", 3]];",
         "// Only change code below this line.",
         "",
-        "var myRemoved = myArray; // This should be [\"John\"] and myArray should now be [23, [\"dog\", 3]]",
+        "var myRemoved = myArray; // This should be [\"John\"] and myArray should now be [23, [\"dog\", 3]].",
         "",
         "// Only change code above this line.",
         "",
@@ -634,8 +634,8 @@
       "title": "Manipulate Arrays With unshift()",
       "difficulty": "9.9818",
       "description": [
-        "Now that we've learned how to <code>shift</code>things from the start of the array, we need to learn how to <code>unshift</code>stuff back to the start",
-        "Let's take the code we had last time and <code>unshift</code>this value to the start: <code>\"Paul\" </code>"
+        "Now that we've learned how to <code>shift</code>things from the start of the array, we need to learn how to <code>unshift</code>stuff back to the start.",
+        "Let's take the code we had last time and <code>unshift</code>this value to the start: <code>\"Paul\"</code>."
       ],
       "tests": [
         "assert((function(d){if(typeof(d[0]) === \"string\" && d[0].toLowerCase() == 'paul' && d[1] == 23 && d[2][0] != undefined && d[2][0] == 'dog' && d[2][1] != undefined && d[2][1] == 3){return true;}else{return false;}})(myArray), '<code>myArray</code> should now have [\"Paul\", 23, [\"dog\", 3]]).');"
@@ -643,13 +643,13 @@
       "challengeSeed": [
         "var ourArray = [\"Stimpson\", \"J\", [\"cat\"]];",
         "ourArray.shift();",
-        "ourArray.unshift(\"happy\");",
         "// ourArray now equals [\"happy\", \"J\", [\"cat\"]]",
+        "ourArray.unshift(\"happy\");",
         "",
         "var myArray = [\"John\", 23, [\"dog\", 3]];",
         "myArray.shift();",
         "",
-        "// Add \"Paul\" to the start of myArray",
+        "// Add \"Paul\" to the start of myArray.",
         "// Only change code below this line.",
         "",
         "",