I think he's referencing a spaced repetition system http://en.wikipedia.org/wiki/Spaced_repetition_system http://en.wikipedia.org/wiki/Spaced_repetition_system

I think he's referencing a spaced repetition system http://en.wikipedia.org/wiki/Spaced_repetition_system http://en.wikipedia.org/wiki/Spaced_repetition_system they have software where you can set up a flashcard system if you know what you are doing, and it will time out when you should review what for optimal memorization