Open Educational Resources are teaching, learning, and research resources that reside in the public domain or have been released under an intellectual property license that permits their free use and re-purposing by others.
Open - Openly Licensed to Support "5R" Benefits - Retain, Reuse, Revise, Remix, and Redistribute.
Educational - Designed for educational use.
Resources - Materials that support teaching and learning, including textbooks, video, assessments, etc.
OER materials are released under an open license granting permission for everyone to:
OER includes learning materials such as: