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 ...

The stellar Khan Academy offers free, well-structured online courses in a variety of subjects that you'll find in US schools, and serves as a reliable source for anyone with a hunger to learn. Where ...

(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 ...