Tired of hearing about how Sal Khan will Change. Education. Forever. some math teachers produce their own take on his videos. Now the Khan hype cycle appears to have reached the “backlash” stage. Some ...

(CBS News) Sal Khan is a math, science, and history teacher to millions of students, yet none have ever seen his face. Khan is the voice and brains behind Khan Academy, a free online tutoring site ...

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: ...