OER stands for Open Educational Resources, which are free teaching, learning, and research materials (usually online). OER includes digital articles and textbooks, as well as audio and video lessons intended for K12 and higher education. Additionally, OER includes teacher and professor resources such as lesson plans, syllabi, quizzes, and activities. The official UNESCO definition specifies that OER resources “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.” The idea behind OER is simple—to increase educational access.
https://news.ucdenver.edu/what-are-open-educational-resources/
