This guide is a general introduction to the OER, the characteristics, benefits and challenges, in addition to links to find OER by subject or type.
"Open Educational Resources (OER) are teaching, learning and research materials that are in any medium – digital or otherwise – that reside in the public domain or have been released under an open license that permits no-cost access, use, adaptation and redistribution by others with no or limited restrictions." *
* UNESCO https://en.unesco.org/themes/building-knowledge-societies/oer
Image from Wikimedia Commons