The document is a presentation about open educational resources (OER) which are freely accessible online teaching and learning materials such as textbooks, videos, and tests that educators can reuse, revise and redistribute. The presentation discusses why OER are important by saving students money and allowing for customization of materials. It provides examples of organizations that create and host OER including universities, non-profits and websites. The presentation encourages educators to search for high-quality OER to reuse or adapt for their courses.