A techie group told me about The Khan Academy. “Check out the Salman Khan YouTube lessons,” they said. “This Salman engages students across time-zones without ever appearing on the screen.” I logged on.

Khanacademy.org has impressive stats. Some 77,331,379 lessons delivered, a library of over 2,400 videos covering everything from arithmetic and physics to finance, and history, with 180 practice exercises. There are brain teasers, tips on the credit crisis. GMAT problems? Check. IIT JEE? Check. Plate tectonics? Check. It's a growing collection of very popular free lessons.

Khan Academy

With an impeccable Harvard and MIT educational background, Khan developed his tutoring hobby when a younger cousin was having trouble with sixth-grade math. It was a hit, requests grew, and tired of repeating the explanations for family and friends, he created videos and posted them on YouTube. These morphed into Khan Academy, a one-man show of videos posted from his bedroom.

Each clip lasts a digestible 10+ minutes. His disembodied voice (he never appears on camera) thinks aloud and writes the equations and arguments in differently-coloured script. “It feels like someone's over your shoulder talking in your ear, as opposed to someone at the blackboard who is distant from you,” said Khan, once a “California hedge-fund manager by day and math geek by night,” but a full-time YouTube lesson-developer now........Read More

Source: The Hindu