OER as a system relies on attribution and mindful licensing to thrive. Not all resources on this page are fully free or OER, but do fit within a larger textbook affordability strategy. Creative commons licensing defines boundaries and permissions for Reusing, Revising, Retaining, Redistributing, & Remixing OER content.
For more information about Creative Commons and quick reference to license definitions see the Creative Commons page.
Skills Commons - assignments and other materials for the trades
PhET - Founded in 2002 by Nobel Laureate Carl Wieman, the PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations. PhET sims are based on extensive education research and engage students through an intuitive, game-like environment where students learn through exploration and discovery.