OER-Open-source Educational Resources

Great source of peer-reviewed textbooks. Tend to lean more toward the sciences.
Usually have additional resources such as ppt slide shows and tests to go along with textbook.
Many are adapted and available in Canvas Commons

The LibreTexts approach is highly collaborative where an Open Access textbook environment is under constant revision by students, faculty, and outside experts.

The ChemCollective, organized by a group from Carnegie Mellon, shares virtual labs, simulations, and molecular level visualizations for chemistry.

Users can model and simulate chemical reactions, focusing on thermodynamics, equilibrium, kinetics, and acid–base titrations.

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.