The Classic Articles in Context (CAC) project of the National Science Digital Library seeks to integrate landmark works of scientific inquiry into dynamic learning spaces for teachers and learners.
The Khan Academy is a "not-for-profit with the goal of changing education for the better by providing a free world-class education to anyone anywhere. " Designed as a type of educational tool and a living archive, the site contains over 2100 videos that include algebra lessons, calculus sessions, cosmology, and developmental math.