This document provides an overview of open educational resources (OER). It defines OER as teaching, learning, and research materials that reside in the public domain or have been released under an open license that permits free use, adaptation, and redistribution. The document discusses the benefits of OER, introduces Creative Commons licenses, and provides guidance on finding, using, and attributing OER. It also lists various OER search services, repositories, open textbooks, and MOOC sources where educators can find materials to reuse or adapt for their own teaching.