Browse Topics

The resources listed on this page are general and not intended to be exhaustive. Where relevant, City University of New York (CUNY) guidelines and resources are listed. For discipline specific OER resources, visit Biology OER, Chemistry OER, and Physics and Astronomy OER.  The wiki OER Handbook for Educators also has resources for the topics listed on this page.

What are Open Educational Resources (OER)?

Open Educational Resources (OER) are teaching, learning and research materials in any medium – digital or otherwise – that reside in the public domain or have been released under an open license that permits no-cost access, use, adaptation and redistribution by others with no or limited restrictions.

This definition is from the United Nations Educational, Scientific and Cultural Organization (UNESCO) and the William and Flora Hewlett Foundation. For OER related concepts, like Open Access and Open Source, see Glossary and Abbreviations.

Finding OER

OER can be identified and accessed through many sources, including:

There are also open access resources that can supplement OER in allowing for free access, even if they do not always allow for modification, such as Open Access journals. The Directory of Open Access Books provides a searchable index to peer-reviewed monographs and edited volumes published under an Open Access business model, with links to the full texts of the publications at the publisher’s website or repository. Non-OER resources may also be used if the use is a “fair use”.

Details on specific finding tools and sources

Eppich Galaxy 4 painting
Eppich, Helmut. Galaxy 4.© LaGuardia Community College. Photo by Dina Pizzarello.©2020.

Evaluating and Selecting OER

The sources listed above under Finding OER also have useful information on evaluating and selecting open education resources. Factors to consider when selecting, adapting or adopting OER:

  • Accuracy / Quality of Content 
  • Relevance and Learning Level
  • Production Quality and Product Testing
  • Accessibility, Ease of Use, Organization and Navigation
  • Interactivity
  • Diversity, Cultural Relevance and Sensitivity
  • Licensing
  • Ease and Speed of Adapting and Remixing and Format Compatibility
  • Currency (up-to-date)
  • Supplemental Learning and Teaching Resources (Homework, Lecture Slides, Labs, etc.)
  • Print Availability and Cost
  • Sustainability

Guides for evaluating and selecting OER

Guide and checklist for evaluating accessibility for Electronic Database and Computer Software Accessibility Evaluation and Internet and Web-based Content Accessibility Evaluation. Source:

Adapting, Creating and Publishing OER

The factors listed above under Evaluating and Selecting OER are also relevant considerations in adapting, creating and publishing OER. Open the following links for guides, tools and forums:

Eppich Galaxy 6 painting
Eppich, Helmet. Galaxy 6.© LaGuardia Community College. Photo by Diana Pizzarello.©2020.

Attribution Best Practices

Under a Creative Common Attribution license— You must give appropriate credit, provide a link to the license, and indicate if changes were made to copyrighted materials. Check the source being used to see what attribution is required or recommended.

Accessibility and Universal Design

1. LaGuardia and CUNY Accessibility Resources

2. Accessibility Checklists, Tools, and Instructions

3. Science, Technology, Engineering and Mathematics (STEM) and Accessibility

4. Templates for Creating Accessible Contents

5. Accessibility Websites

Eppich, Helmut. Galaxy 1 (Closeup). ©1994
Eppich, Helmut. Galaxy 1. ©1994. LaGuardia Community College. Photo by Diana Pizzarello.©2020.

Evaluating OER Effectiveness and Impact

OER Events


2021 Open Education Conference “Making Open for All. October 18-22, 2021. Virtual. OpenEd21 Registration


  • 12th Annual CUNY Accessibility Conference, April 6 – 9, 2021. “Perspectives on Access: Innovations, Lessons Learned, and Looking Forward.”

Owl and Slow Loris Tips for Site Editors

The Owl and Slow Loris Tips for Site Editors page contains help and tips for authors and editors, working with the WordPress block editor and this site, MyOpenMath, or other OER platforms.