fix/grammar+punctuation

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-a-javascript-promise.english.md

@@ -6,7 +6,7 @@ challengeType: 1
 
 ## Description
 <section id='description'>
-A promise in JavaScript is exactly what it sounds like. You use it to make a promise to do something, usually asynchronously. When the task completes you either fulfill your promise or fail to do so. <code>Promise</code> is a constructor function, so you need to use the <code>new</code> keyword to create one. It takes a function as its argument with two parameters, <code>resolve</code> and <code>reject</code>. These are methods used to determine the outcome of the promise. The syntax looks like this:
+A promise in JavaScript is exactly what it sounds like. You use it to make a promise to do something, usually asynchronously. When the task completes, you either fulfill your promise or fail to do so. <code>Promise</code> is a constructor function, so you need to use the <code>new</code> keyword to create one. It takes a function as its argument with two parameters: <code>resolve</code> and <code>reject</code>. These are methods used to determine the outcome of the promise. The syntax looks like this:
 
 ```js
 const myPromise = new Promise((resolve, reject) => {

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/handle-a-fulfilled-promise-with-then.english.md

@@ -19,7 +19,7 @@ myPromise.then(result => {
 
 ## Instructions
 <section id='instructions'>
-Add the <code>then</code> method to your promise. Use <code>result</code> as the argument of its callback function and log <code>result</code> to the console.
+Add the <code>then</code> method to your promise. Use <code>result</code> as the parameter of its callback function and log <code>result</code> to the console.
 </section>
 
 ## Tests

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/handle-a-rejected-promise-with-catch.english.md

@@ -16,12 +16,12 @@ myPromise.catch(error => {
 
 <code>error</code> is the argument passed in to the <code>reject</code> method.
 
-<strong>Note:</strong> the <code>then</code> and <code>catch</code> methods can be chained to the promise declaration if you chose.
+<strong>Note:</strong> the <code>then</code> and <code>catch</code> methods can be chained to the promise declaration if you choose.
 </section>
 
 ## Instructions
 <section id='instructions'>
-Add the <code>catch</code> method to your promise. Use <code>error</code> as the argument of its callback function and log <code>error</code> to the console.
+Add the <code>catch</code> method to your promise. Use <code>error</code> as the parameter of its callback function and log <code>error</code> to the console.
 </section>
 
 ## Tests