OER stands for Open Educational Resources. Open NYS defines OER as "teaching, learning, and research resources that reside in the public domain or have been released under an intellectual property license that permits repurposing by others." For students, the generally accepted meaning is free online textbooks. For faculty, OER means more control over learning materials.
For more information about the OER Initiative at SUNY Ulster and links to ready to adopt materials, see the library's OER for Student Success guide.