This LibGuide was written by staff of the University of Groningen. However, for our guidelines and our resource lists, we have consulted many other sources to learn what was the best way to describe the concepts of open education and to find sources of OER.

On this page, we want to acknowledge these sources as inspiration sources, and extend our gratitude to the creators of these sources for providing high quality information on the topic of Open Education.

• Where to search for OER document by Mira Buist-Zhuk (University of Groningen, 2021), adapted from “How Do I Find OER” by Kelsey Smith (2019), modified by Liz Yata (2020), licensed under CC BY 4.0.
• robertschuwer.nl by Robert Schuwer
• The Open Educational Resources Libguide of Lehman College
• The Go Open: A beginner's guide to open education Libguide of Dublin City University by O. Farrell, E. Breen, J. Brunton, R. Cox, E. Costello, L. Delaney, E. Gallagher, and V. Smyth
• The Open Education Resources Libguide of the University of Iowa
• The Open Textbooks, OER & Other Open or Free Resources for Faculty Libguide of Kirkwood Community College
• The Open Educational Resources Libguide of the University of Kentucky (Stephen Krueger)
• The Open Education Libguide by Virginia Tech (Anita Walz)
• The Open Education Libguide of Arizona State University (Anali Perry)
• The Affordable Course Materials and Open Educational Resources (OER) for Faculty Libguide of the University of California San Diego
• The Open Educational Resources at LCC Libguide of Lansing Community College  (Denise Warner)
• The Open Educational Resources Libguide of Austin Community College
• The OER: Open Educational Resources Libguide of the University of Pittsburgh
• The OER - Open Educational Resources Libguide of Portland Community College (Rachel Bridgewater)
• The Open Educational Resources Libguide of the University of Massachussetts Amherst (Theresa Dooley)
• The Open Education page of the Digital Education Office of the University of Bristol
• The OER and Low-Cost Materials at Penn State website of Pennsylvania State University
• The Open Fredonia Toolkit Libguide of Fredonia State University of New York (Christina Hilburger)
• The Open Educational Resouces (OERs) Libguide of Portland State University by Karen Bjork and Amy Stanforth
• The Open Educational Resources Libguide of the Vrije Universiteit Amsterdam
• The Open Education Libguide of the Hogeschool van Arnhem en Nijmegen
• The Open UAS page of the University of Alaska Southeast
• The OER: Open Educational Resources Libguide of the University of Alaska Southeast 
• The Open Education page of North Carolina State University
• The Find and Evaluate Open Educational Resources (OER) page of North Carolina State University
• The Open Educational Resources page of the University of Nevada, Las Vegas
• The Open Educational Resources (OER) page of The University of Arizona
• The Open Education page of the New England Board of Higher Education
• The Open Educational Resources (OER) Libguide of the Technological University of the Shannon (Celine Peignen)
• The OER Toolkit Libguide of Northwestern University (Lauren McKeen McDonald)
• The Open Educational Resources Libguide of the University of New Hampshire (Eleta Exline)
• The Open Educational Resources Libguide of the City University of New York
• The Open Educational Resources (OER) Libguide of Saginaw Valley State University
• The Open Educational Resources Libguide of Maastricht University
• The Open Educational Resources page of the Technische Universiteit Delft
• The Open Education at UTA Libguide  of the University of Texas Arlington (Jessica McClean