Described as Bill Gates’ favorite teacher, Khan is on a mission to provide a free, world-class education for anyone, anywhere. He started Khan Academy to offer open access to quality, self-guided learning tools online. The Academy, which grew out of a series of online YouTube videos Khan created to tutor nieces and nephews in New Orleans, now has more than 6 million users per month. It has delivered more than 250 million lessons in the last two years, covering subjects from basic math to college-level biology and art history. Khan has been profiled by Fast Company, Forbes, “60 Minutes” and named one of TIME magazine’s 100 most influential people in the world.