OER provide teachers, learners, and others with legal permissions to engage in the 5R activities:
For Open Educational Resources (OER), use a similar evaluation process as you would when assessing a new textbook or other course materials you are interested in adding to your class. Here are some suggested steps and questions to ask:
Adapted from the University of Illinois Urbana-Champaign Library's Evaluate OER page.
The resources below discuss how to adapt open textbooks.