Andrew Wade: Working from the comfort of his home, Salman Kahn has made available over fifteen hundred mini-lectures to educate the world. Subjects range from math and physics to finance, biology, and current economics.Kahn Academy amounts to little more than a YouTube channel and one very, very devoted man. He is trying to provide education in the way he wished he had been taught.

With over 100,000 video views a day, the man is definitely making a measurable difference for many students young and old. In his FAQ he explains how he knows he is being effective. What will probably ensure his popularity (and provide a legacy surpassing that of the most highly-paid educators) is that everything is licensed under Creative Commons 3.0. He only needs his time, a $200 Camtasia Recorder, an $80 Wacom Bamboo Tablet, and a free copy of SmoothDraw3.

While the lecturing may not be quite up to the Feynman level, it’s a great augmenter for advanced learners, and a lifeline for those without much access to learning resources.

A Global Teacher of 1,516 Lessons And Counting