You'll likely find it useful to evaluate OER based on the same standards you use to evaluate other course materials. Here are a few criteria to consider:

• Content: Does this OER cover what you'd like your students to learn in the course?
• Accessibility: Is the content and reading level at the right level for your students? Is it challenging enough? Is the level of technicality appropriate for your course?
• Use: Is the license open? Can you share, reuse, and remix the content freely? For more information regarding copyright and Creative Commons licenses, please visit Copyright & Creative Commons.
• Quality: Is the OER peer reviewed? Can you read reviews from other instructors who teach courses like yours? Are errors corrected or noted?
• Format: Does the material come in a format your students can access easily? Is special software required? Can the material be printed or purchased in print at a low cost? 

"Open Educational Resources University of Texas LibGuide" by Heather Walter is licensed under CC BY-NC 2.0