StudyEdge (YC S13) is doing a great job with a similar service. They provide Khan Academy-style videos with a live support system (on the FB app platform). The

StudyEdge (YC S13) is doing a great job with a similar service. They provide Khan Academy-style videos with a live support system (on the FB app platform). The videos + support system are meant to supplement university courses-- essentially acting as a web tutor. Their own supplementary question banks tend to be deep and well designed. I used the service to get through Calc 2 as an undergrad. I liked it so much (went from a C+ to A student in math) that I went to work there the next summer!