OPEN EDUCATIONAL RESOURCES (OER)
Open Educational Resource is any online educational material that is freely accessible and openly licensed for public consumption.

You can find most of the open textbooks available online as well as reviews from faculty that have used them in their class.

If you want to find supplementary materials or other resources you can use instead of a textbook, site like OER commons provide a wealth of resources you ca use and easy to use software for creating your own OER as well.

With free technology solutions, Curriki brings simplicity to authoring and publishing, opening up a new world of possibility for student engagement, empowering educators to create interactive experiences for learners at all levels.



Have highly rated materials for introductory or general education courses like Astronomy, Physics, and Chemistry
Site: https://openstax.org/

Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computing, history, art history, economics, and more, including K-14 and test preparation (SAT, Praxis, LSAT) content. We focus on skill mastery to help learners establish strong foundations, so there's no limit to what they can learn next!

MIT OpenCourseWare is an online publication of materials from over 2,500 MIT courses, freely sharing knowledge with learners and educators around the world.
Site: https://ocw.mit.edu/

A collection of high quality, free-to-use courses that you can download and use for teaching. All content is stored in Google docs making it easy to access, browse and download.

STARBOOKS contains thousands of digitized science and technology resources in various formats (text and video/audio) placed in specially designed “pods” set in a user-friendly interface.