This is Salman Khan, the guy behind the Khan academy. If you do not know Khan Academy, quit whatever you're doing and go to his youtube channel. He has an excellent collection of online courses for Physics, Biology, Economics and more topics. I've learned a lot about economics from this guy - He is excellent.
Today i discovered this video. Its a presentation that he did in TED and talks about Khan Academy and the experience that he earned from this remarkable work...