Ok, so the talk goes for 20 minutes but he's very easy to listen to, entertaining and explains some great new features he's introduced to his Khan Academy. The whole idea of flipping the classroom is very appealing.
Khan Academy is on a mission to provide a free world-class education to anyone anywhere. With over 2,600 videos covering everything from arithmetic to physics, finance, and history and 200 practice exercises, we're helping students learn whatever they want, whenever they want, at their own pace.