OER: The Future of Education Is Open - Lisa Young, Una Daly and Jason Stone, EDUCAUSE Review

OER 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." https://er.educause.edu/articles/2017/8/oer-the-future-of-education-is-open