This document discusses open educational resources (OER). It defines OER as teaching and learning materials that are freely available online for anyone to use, such as courses, modules, syllabi, lectures, assignments, and other resources. OER allow resources to be reused, revised, remixed, and redistributed. The document outlines several benefits of OER, such as engaging students worldwide and enhancing collaboration. It also discusses some challenges of OER, including issues around copyright and ensuring quality. Overall, the document provides an overview of what OER are and their role in teaching and learning.