Open Education 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."
OERs were born from the Open Education movement, which seeks to use the technological tools of the Internet to make knowledge and learning affordable and globally accessible. Examples of material formats released as OERs include but are not limited to online courses, textbooks, videos, tutorials, lectures, syllabi, tests, blogs, and wikis.
Open Access (OA) refers to freely accessible materials available online, free of charge, and free of most copyright and licensing restrictions.
Open Education Resources (OERs) are any type of OA educational materials that are in the public domain or covered by an open license. The nature of these open materials means that anyone can legally and freely copy, use, adapt and re-share them. OERs range from textbooks to curricula, syllabi, lecture notes, assignments, tests, projects, audio, video and animation.