Over the past decade, the free instructional website Khan Academy has transformed how tens of millions of students across the globe perceive and approach math. Now, it’s pursuing a bigger aim: ...

Corrected: An earlier version of this story incorrectly stated the number of registered users of the Khan Academy. It is 137 million users. A bevy of technology and software tools are taking center ...

Before he started the most popular education site on the Web, Salman Khan was neither an educator nor an entrepreneur. His outsider status helps explain why he's been able to solve a problem that ...