Open Educational Resources (OER) are teaching, learning, or research resources that are offered freely to users in at least one form and that reside in the public domain or have been released under an open copyright license that allows for their free use, reuse, modification, and sharing with attribution.
open educational resource (OER) - "
affordable educational resource aka affordable course content - "any required course material that students purchase for less than $50. This may include low-cost or no-cost options and library materials that do not have an open license."
open access (OA) - content that is "digital, online, free of charge, and free of most copyright and licensing restrictions;" typically refers to scholarly works.
gratis OA - refers to free-to-read scholarship that remains under copyright or other license protection ("free as in lunch")
green OA - refers to free-to-read, repository-based open access scholarship, typically as a result of author self-archiving.
gold OA - refers to free-to-read open access scholarship that is subsidized by per-publication fees or other means.
libre OA - refers to free-to-read scholarship that is also public domain or licensed for reuse for purposes that exceed Fair Use ("free as in liberty")
|OER Repositories by Item Type|
|California's Open Online Library for Education|
|Google Scholar||MIT OpenCourseWare||Wikibooks|
|World Lecture Project|
|Metropolitan Museum of Art|
|Public Domain Review|