CultusKhan Academy is a non-profit organization with the goal of changing education for the better, by providing a free world-class education for anyone anywhere.
All of the site’s resources are available to anyone: student, teacher, home-schooler, principal, adult returning to the classroom after 30 years, or a friendly alien just trying to get a leg up in micro-biology from Earth.
Khan Academy’s materials and resources are available to you completely free of charge, and you can also visit their Khan Academy You Tube channel for latest video updates.