I'm the 'Dear Abby' of math problems. But if you understand something, shouldn't you be able to explain it? Isn't that the whole point?

The ideal direction is using something like Khan Academy for every student to work at their own pace, to master concepts before moving on, and then the teacher using Khan Academy as a tool so that you can have a room of 20 or 30 kids all working on different things, but you can still kind of administrate that chaos.

I've already got a beautiful wife, a great son, and a house. What else do you need?

Sal Khan Quotes