It's that time of year; millions of American students of all ages are going back to school. And that means a lot of conversations about issues large and small, everything from how we pay for education to what we expect the process to produce. One thing almost everyone can agree upon is that education means learning of some kind. And, when people try to learn they sometimes struggle. It was twelve years ago that a financial analyst by the name of Sal Khan started helping a young cousin who was having trouble with math. It was distance learning and personalized learning, delivered one-on-one over the Internet. Pretty soon, other family members "wanted in" and that led Sal to making videos of his tutorials and posting them online. Then, things really blew up. Today, it would be hard to find a student, teacher or parent who hasn't heard of the Khan Academy, a nonprofit started by Khan that offers video lessons free over the Internet. Many of the lessons are still delivered by Khan himself. Susan Leigh Taylor and Stan Bunger talk with him.