"Open Educational Resources (OERs) are any type of educational materials that are in the public domain or introduced with 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." - UNESCO
As the definition above illustrates, OER are not limited to only open textbooks; however, textbook affordability is a central issue for many OER initiatives.
If you'd like to learn more about OER and textbook affordability, visit the Open Educational Resources and Affordable Textbooks guide.
Your library liaison can work with you to identify OER that will support your course.
If you want to try searching on your own, the box below allows you to directly search OASIS, a tool to help locate OER.
The Milne Library at SUNY Geneseo developed OASIS, a tool that searches across multiple OER sites.