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

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.

No files, chapters, tests, or entry points are named. Start by surveying the existing chapter code blocks and deciding whether exercises should be scattered or placed at chapter ends. Done means selected chapters contain empty coding exercises with prompts and a consistent format.