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Open Educational Resources (OER)

OER Repositories

There are many open materials out there, and these repositories can help to sift through the content. 

  • OER Commons - provides tens of thousands of open educational resources, including college-level open textbooks from higher education institutions around the world.

  • CUNY Open Educational Resources

  • PhET Interactive Simulations - Responsive and accessible STEM simulations

  • MERLOT II - initiated by California State University, a curated collection of free and online learning materials, including multimedia resources.

  • L4 Learning Library - A virtual resource exchange for assignments and learning activities 

  • OpenStax CNX -  repository of thousands of learning objects

  • Open Oregon State Modules - open modules in the agricultural sciences and STEM fields that have dual-language functionality (Chinese-English and Spanish-English)

  • Teaching Commons - OERs from colleges and universities across the country

OER Search Engines

  • Mason OER Metafinder (MOM) - Real-time federated search for OER content from George Mason University Libraries.
  • OASIS (Openly Available Sources Integrated Search)  - a search tool that aims to make the discovery of open content easier. OASIS currently searches open content from 98 different sources and contains 368,237 records and is being developed at SUNY Geneseo's Milne Library.

Open Textbooks

Open Multimedia


Museums, Libraries, & Archives


Public domain (unless otherwise noted):

Creative Commons licensed:

Free to link to: