These OER textbook repositories are good places to start your search for OER.
These collections contain some textbooks, but also ancillary materials such as test banks, lecture notes, web content, videos, presentations, and more.
OER is often housed in online collections or repositories. Because even strong collections are not always well-crawled by Google, you may have to dig a bit. You can start with a metasearch tool. Tools like the Mason OER Metafinder (below) and OASIS Metasearch will allow you to search across platforms, which can save a lot of time.
Not all disciplines and subject areas are equally represented in OER repositories. If you can’t find what you need, consider:
When deciding whether to adopt an OER, you’ll need to spend the same time evaluating it as you would a regular textbook. These guides can help: