Backstory: Reading anything other than business or technical related items is a chore for me. I've always struggled. With the rise in "choose your own adventure" type games, a combination would be awesome.
The Idea: Choose your own adventure for textbooks.
Deep Dive: You would write a text book such that when the reader turns to the wrong answer, you explain why it's incorrect and then give them the page for the correct answer. You should start with a topic you're passionate about.
Validation: As education continues to evolve, there is quite an opportunity to make reading more fun.
Monetization: Similar to current text books, you would charge an exorbitant amount of money for the book and profit. Slightly kidding... current textbook prices are crazy :-p
P.S. Have you started any of these ideas? Let me know, I'd love to hear from you