Grok TiddlyWiki by Soren Bjornstad is an interactive learning environment for TiddlyWiki. It bundles three complementary modes of learning into one TiddlyWiki:

• It explains concepts using English text and code examples
• It assigns exercises that help you apply and practice what you've learned
• It presents takeaways, questions about key terms, concepts, or skills, for review as you continue through the book, to help you retain what you've learned over a longer period of time

https://groktiddlywiki.com/read/