Salman Kahn and his Kahn Academy receives Five Learning Efficiency Stars for using a Tablet PC to instruct millions on YouTube about how to solve math and science problems. He sets an amazing pace for teachers everywhere. He creates each lesson, instructs, and broadcasts from a closet in his bedroom in Silicon Valley.
About 40,000 people daily learn from among 1,200 free lessons posted on his electronic blackboard. Besides math, he offers lessons in science and its applications.
Kahn earns...
