Khan Academy

Khan Academy is a non-profit that provides a free world-class education for anyone, anywhere. We're building a virtual classroom to support millions of learners in assessing knowledge, encouraging cooperative learning, and providing real-time learner data. We're radically rethinking how to leverage technology inside and outside the classroom. http://www.khanacademy.org/about

Interested in social ROI? Contact donate at khanacademy.org.