"Open Educational Resources (OER) are teaching, learning, and research materials 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, 2018)
![](https://libapps.s3.amazonaws.com/accounts/179745/images/What_is_an_OER_graphic.jpg)
"OER" Fort Hays State University, www.fhsu.edu/oer/