Code challenges throughout chapters, or ending sections with code blocks.

[Austing767]

Feature

Code blocks or coding exercises throughout chapters, while there is active code, the code is already there and leaves the student with no room to write their own code.

Describe the solution you'd like
Empty code blocks scattered in some chapters with a simple question above, or a ending section to the chapter with those simple coding challenges.

[pearcej]

We might begin with text that says practice the ideas in the chapter followed by an empty activecode block as a first step at teh end of each chapter where that makes sense as a thing to do.