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: ...

(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 ...

Khan Academy, a one-world schoolhouse, teaches thousands of free lessons online. Jan. 3, 2013— -- Admit it, no matter how old you are, you can still remember what the bell sounded like at your ...