Add introduction about strings: creation

SUMMARY.md

@@ -8,4 +8,5 @@
     * [Creation](numbers/create.md)
     * [Basic Operators](numbers/operators.md)
     * [Advanced Operators](numbers/advanced.md)
-
+* [Strings](strings/README.md)
+    * [Creation](strings/create.md)

strings/README.md

@@ -1,5 +1,11 @@
 # Strings
 
-JavaScript strings share many similarities with string implementations from other high-level languages, such as Python's. They represent text based messages and data.
+JavaScript strings share many similarities with string implementations from other high-level languages. They represent text based messages and data.
 
 In this course we will cover the basics. How to create new strings and perform common operations on them.
+
+Here is an example of a string:
+
+```javascript
+"Hello World"
+```

strings/create.md

@@ -1,5 +1,7 @@
 ## Creation
 
+You define strings in JavaScript by enclosing the text in single quotes or double quotes:
+
 ```js
 // Single quotes can be used
 var str = 'Our lovely string';
@@ -27,26 +29,3 @@ assert(str === 'abc');
 ```
 
 ---
-
-### Transforming objects to strings with .toString()
-
-Most javascript objects such as `Number`s can be transformed into strings using the `.toString()` method.
-
----
-
-Create a variable named `numstr` that is a string transformed from the `num` variable.
-
-```js
-var num = 27;
-```
-
-```js
-var num = 27;
-var numstr = 27.toString();
-```
-
-```js
-assert(numstr === '27');
-```
-
----