This document discusses open educational resources (OER) and their use in course design. It defines key aspects of OER like being openly accessible, freely available, and shareable. The document provides examples of OER and how they can be used, including identifying main course topics, searching for and selecting reusable resources, and writing supporting materials. It contrasts how OER may be used openly or within structured membership systems. Useful resources on OER and links for further information are also included.