Learn more about OERs with our Open Educational Resources Guide.
"Open Educational Resources are teaching and learning materials that you may freely use and reuse, without charge... OERs often have a Creative Commons or GNU license that state specifically how the material may be used, reused, adapted, and shared." [From OERCommons.org (Opens New Window)].
For subject specific OERS, explore the tabs of this guide.
For the full repositories, you can use the links below:
Please be sure to check quality of any materials and copyright requirements for any materials you plan to use for your class.