Khan Academy - Tremendous!

Now that the creator of Khan Academy got Google's 2 million dollar award and is getting more attentions from the major news media, this fabulous site with tremendous prospect should reach more students in every corner of our globe. The selection of video tutorial is growing, and the samples of them I've viewed are to the point and like sitting with a tutor beside me.

Link: http://www.khanacademy.org/