Based on a really old edition before it was renamed "Think Python" eons ago. The "interactivity" is pretty much quiz questions that test that you read the chapter at all. Looks like it has some pythontutor integration too, but not much. Layout feels like they gave up on the CSS halfway through.<p>You're better off going here instead, interactive or no: <a href="https://allendowney.github.io/ThinkPython/" rel="nofollow">https://allendowney.github.io/ThinkPython/</a>