One's perception of themselves has a much bigger role than has been acknowledged to determine who succeeds and who does not.

By early 2009, tens of thousands of students were watching tutorials on the Khan Academy every day. The software I wrote for my cousins had become so popular, it was making my $50-a-month web host crash. The possibilities surrounding the academy were so exciting that I had trouble doing my day job properly. And soon, I quit.

We don't believe that you should ever replace physical education. Even in a thousand years, a computer will never be able to do so.

Sal Khan Quotes