The following script is from "Teacher to the World" which aired on March 11, 2012, and was rebroadcast on Sept. 1, 2013. Sanjay Gupta is the correspondent. Denise Schrier Cetta, producer. Take a ...

iPad: The Khan Academy provides over 3,000 free educational videos, exercises, and lectures covering the span of everything from math, physics, finance, and history. It's one of our favorite places to ...

Susan Kramer watched her packed 10th grade biology class weave through rows of desks, pretending to be proteins and picking up plastic-bead “carbohydrates” and goofy “phosphate” hats as they navigated ...

(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 ...