How is it that in all the years of public schools and university throwing flash cards at us that I have never, until this thread, heard of spaced repetition systems? I looked up the program you recommended and will try it out for sure, but here's my questions for you: Is this something that you do everyday to maintain, how many subjects do you use this system on at one time and how long each day do you spend total doing this? Thanks for the info and recommendation - looking forward to using it.