Salmon Khan Is a Viral teacher who teaches by videos on the internet. He has over four million viewers world wide. It all started in 2004. He worked as a financial analyst on Wall Street when his cousin Nadia wanted help on something in math. He decided to make a video and uploaded it to Youtube. He got a lot of views and comments from other people and they loved his videos.
In 2009 he quit his job and made youtube videos on math for a living. He worked in his closet at home, making videos on how to work out math problems.