Salman Khan is the founder of an online educational website which features more than 4,000 mini lectures for anyone around the world. It is a free website which has video tutorials stored on websites such as YouTube teaching subjects such as Mathematics, History, Healthcare, Medicine, Finance, Physics, Chemistry, Biology, Astronomy, Economics, Cosmology, Organic Chemistry, American Civics, Art history, Macroeconomics, Microeconomics and Computer Science. They have over all delivered over 240 million lessons. He recently published the international best-seller, The One World School House in October 2012. He was featured on the Forbes magazine cover with the story “$1 Trillion Opportunity” where he was described as “The Most Influential Person In Education Technology”.