small things

Author: Akuli

advanced/datatypes.md

@@ -55,7 +55,7 @@ True
 
 We can also convert anything [iterable](../basics/loops.md#summary) to a
 set [by calling the
-class](../basics/classes.md#why-should-i-use-custom-classes-in-my-projects).
+class](../basics/classes.md#what-are-classes).
 
 ```python
 >>> set('hello')

basics/classes.md

@@ -1,13 +1,13 @@
-# Defining and using custom classes in Python
+# Defining and using custom classes
 
 When I was getting started in Python I learned to make classes for
 tkinter GUI's before I understood how they work. Everything I did with
 classes worked, but I didn't understand how. Hopefully you'll first
 learn to understand classes, and then learn to use them.
 
-## Why should I use custom classes in my projects?
+## What are classes?
 
-Python comes with a lot of classes that you are already familiar with.
+Python comes with many classes that we know already.
 
 ```python
 >>> str
@@ -51,11 +51,11 @@ We can also get an instance's class with `type()`:
 >>>
 ```
 
-Let's say you make a program that processes data about websites. With a
-custom class, you're not limited to `str`, `int` and other classes
-Python comes with. Instead you can define a Website class, and make
-Websites and process information about websites directly. Defining your
-own object types like this is called **object-orientated programming**.
+Let's say that we make a program that processes data about websites.
+With a custom class, we're not limited to `str`, `int` and other classes
+Python comes with. Instead we can define a Website class, and make
+Websites and process information about websites directly. Defining our
+own types like this is called **object-orientated programming**.
 
 ## First class