"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 repurposing by others. OER include full courses, course materials, modules, textbooks, streaming videos, tests, software, and any other tools, materials, or techniques used to support access to knowledge." ~ William & Flora Hewlett Foundation
This video was published by The Council of Chief State School Officers (2016).
There are five primary components to the use of Open Educational Resources (OERs), as per David Wiley. Those include the ability for materials to be retained, reused, revised, remixed, and redistributed.
"5 Rs image" by David Wiley