Open Educational Resources (OER) are teaching, learning and research resources that are made freely available to users anywhere. They may include, but are not limited to, textbooks, readings, multimedia, software, assessment tools and even entire courses. Most are covered by licenses that allow using, remixing and sharing.
Looking for some OER or more information? Check out the following sections of this guide:
OER provides users with free and perpetual permission to engage in the 5R activities:
From "Defining the 'Open' in Open Content and Open Educational Resources" by David Wiley