> It would make sense if you could get electronic textbooks which are already in the question/answer form required by spaced repetition software, ready to "load and learn". Rather than reading a traditional textbook, you would take an equivalent question/answer set and learn it by spaced repetition. Do such things exist?

I am working to solve exactly this. A form of learning where the learning happens due to interaction between a bot and a human. Machine teaching humans basically. Been working for over 20 months. Will be releasing within two weeks. :)