About a month ago I discovered The Kahn Academy. Since then, I've found myself spending spare moments watching the video tutorials to refresh my memory on a number of topics including finance, banking, the credit crisis, statistics, linear algebra, and physics. Although short (~10 minutes), the tutorials are very well done and a great resource.
Evidently, the creator, Salman Kahn, started out making video tutorials for a geographically distant niece. Unexpectedly, other people around the world began watching the videos and sending positive feedback. This motivated Kahn to turn the effort into a non-profit venture dedicated to providing high-quality, free educational materials. An inspiring story.
Also impressive is Kahn's simple approach of drawing diagrams on a "black board" in real-time - very similar to back-of-the-napkin visual brainstorming. Like all good teachers, Kahn's deep understanding allows him to discuss complex topics in a readily understandable manner.
If you've got a spare moment, I encourage you to check out a video.
