It would be really interesting to see an interactive textbook that is combined with audiobook and asks you to read along and summarise every chapter. Not only it would increase speed of reading, but also help with memorising content.
This is probably one of the best ideas I read on HN this year. It just seems to match up very well with my own study experiences, and the advice I have read recently in 'A Mind for Numbers' http://www.amazon.com/dp/B00G3L19ZU
Thanks, I shall try this!