Interactive lessons with runnable exercises
Each chapter on the Learn map teaches one idea with a worked example, a trace you can step through, hints and a Python exercise.
What changed
Lessons live under Learn. Each one explains why the idea works, traces it on a small input and ends with an exercise you write and run on the page.
Exercise runs stay separate from your solve counts and grades. The first exercise you pass earns a one-time 10 XP bonus.