From BusinessWeek, a new teaching strategy seems to be reaching students in ways that classrooms do not.
In August 2004, Salman Khan agreed to help his niece, Nadia, with her math homework. Nadia was headed into seventh grade in New Orleans, where Khan had grown up, but she hadn't been placed in her private school's advanced math track, which to a motivated parent these days is a little bit like hearing your child has just been diagnosed with Lou Gehrig's disease. In particular, Nadia was having trouble with unit conversion, turning gallons into liters and ounces into grams.
Math was something Khan, then 28, understood. It was one of his majors at the Massachusetts Institute of Technology, along with computer science and electrical engineering. He had gone on to get a master's in computer science and electrical engineering, also at MIT, and then an MBA from Harvard. He was working in Boston at the time for Daniel Wohl, who ran a hedge fund called Wohl Capital Management. Khan, an analyst, was the only employee.
Being a bit of a geek, Khan put Yahoo!'s (YHOO) Messenger to work to help Nadia, using the Doodle function to let him illustrate concepts for his niece as they spoke on the phone. Then he wrote some code that generated problems she could do on a website. With Khan's help, Nadia made it into the fast track, and her younger brothers Arman and Ali signed on for Khan's tutoring as well. Then they brought in some of their friends. Khan built his site out a little more, grouping the concepts into "modules" and creating a database that would keep track of how many problems the kids had tried and how they had fared, so he'd know how each of his charges was progressing.
Messenger didn't make sense with multiple viewers, so he started creating videos that he could upload to YouTube. This required a Wacom tablet with an electronic pen, which cost about $80. The videos were each about 10 minutes long and contained two elements: his blackboard-style diagrams—Khan happens to be an excellent sketcher—and his voice-over explaining things like greatest common divisors and equivalent fractions. He posted the first video on Nov. 16, 2006; in it, he explained the basics of least common multiples. Soon other students, not all children, were checking out his videos, then watching them all, then sending him notes telling him that he had saved their math careers, too.
Less than five years later, Khan's sideline has turned into more than just his profession. He's now a quasi-religious figure in a country desperate for a math Moses. His free website, dubbed the Khan Academy, may well be the most popular educational site in the world. Last month about 2 million students visited. MIT's OpenCourseWare site, by comparison, has been around since 2001 and averages 1 million visits each month. He has posted more than 2,300 videos, beginning with simple addition and going all the way to subjects such as Green's theorem, normally found in a college calculus syllabus. He's adding videos on accounting, the credit crisis, the French Revolution, and the SAT and GMAT, among other things. He masters the subjects himself and then teaches them. As of the end of April, he claims to have served up more than 54 million individual lessons.
His program has also spread from the homes of online learners to classrooms around the world, to the point that, in at least a few classrooms, it has supplanted textbooks.
The Khan Academy has also been introduced in two seventh-grade classrooms for struggling learners in the Los Altos district, and the district is considering using it in all schools next year. "Their improvement has been dramatic," says Khan of the slow group, who notes that his studies are small, not peer-reviewed, and just intended for him to get a sense of whether Khan Academy methods are working or not. "We're seeing 70 percent on average improvement on the pre-algebra topics in those classrooms. It definitely tells us it's not derailing anything. All the indicators say that something profound looks like it's happening."
Link: BusinessWeek, Salman Khan: The Messiah of Math
Link: Khan Academy, http://www.khanacademy.org/