50 Sites guest Taylor Pettis writes:
"Sophia is a first-of-its-kind social education platform that offers students many ways to learn by making free, credible academic content available to anyone, anywhere, at anytime. The site offers more than 25,000 tutorials created by hundreds of teachers and experts taught in a variety of ways. The platform further enhances the learning process by offering quizzes, assessing learning preferences and providing learning paths that lead students from one topic to the next so students of all ages can learn the way they learn best.
For more information, visit www.sophia.org."
With lots of new content on the site all the time, it is worth browsing through to see how other educators are leveraging technology to expand the walls of their classroom.
You can read more on my 2011 post.