Salman Khan, founder of non-profit organization www.khanacademy.com created a free way that allows anyone in the world to go online and watch more than 4,300 videos on subjects ranging from algebra to cosmology and astronomy. His lessons have been delivered more than 260 million times and are available to anyone with an internet connection.
This is historical material “frozen in time”. The website is no longer updated and links to external websites and some internal pages may not work.
