If you are looking for OER to support your course, explore various sources for openly licensed materials such as full course materials, assignments, test banks, videos, images, and more.


M.O.S.T. Commons is a collaborative, online space designed to support the sharing and creation of OER. Through M.O.S.T. Commons, you will have the opportunity to access openly licensed content and collaborate with faculty within your institution and across Maryland.

Discover: Members of the site can explore the curated collections of OER curated by the M.O.S.T. initiative.

Collaborate: Institutional Sites and Groups provide a flexible environment to collaborate with others in your network or disciplinary area across institutions.

Create: Using the Open Author feature of the site, users can build and publish OER content on their own or with others.



If you’re looking for materials to support a course, and not finding anything on the M.O.S.T. Commons, check out these additional resources to search for high-quality OER.

B.C. Open Textbook Project

A collection of open textbooks coordinated by BCcampus and aligned with the top 40 highest-enrolled subject areas in British Columbia and textbooks targeting trades, technology, and skills training. Learn More

Open Textbook Library

Referatory supported by the Center for Open Education and the Open Textbook Network at the University of Minnesota that points to peer-reviewed open textbooks by a variety of authors and publishers. Learn More


A multi-institutional collaborative venture initiated at the University of California, Davis, LibreTexts’ Living Libraries incorporates OER created by students, faculty and outside experts in twelve disciplines, mainly in STEM. Learn More

Open SUNY Textbooks

An open access textbook publishing initiative established by The State University of New York libraries that engages faculty as authors and peer-reviewers and libraries as publishing service and infrastructure. Learn More

MERLOT Collection

Created by the California State University for Distributed Learning, the collection contains over 40,000 discipline-specific learning materials, learning exercises, and Content Builder web pages, together with associated comments, and bookmark collections, submitted by members of the MERLOT community. Learn More

Openly Available Sources Integrated Search (OASIS)

A tool developed at SUNY Geneseo’s Milne Library that searches open content from 64 different sources and contains over 160,000 records. Learn More

M.O.S.T. OER Commons

Referatory and collaboration platform to support and promote open educational practice and the creation, curation and adoption of OER in Maryland. Learn More

OpenStax CNX

Tens of thousands of learning objects that are organized into thousands of textbook-style books in a host of disciplines, all easily accessible online and downloadable to almost any device; supported by Rice University and several philanthropic organizations. Learn More

The Mason OER Metafinder (MOM)

The Mason OER Metafinder helps you find Open Educational Resources. It searches well-known OER repositories like OpenStax, OER Commons, MERLOT but also sites like HathiTrust, DPLA, Internet Archive and NYPL Digital Collections where valuable but often overlooked open educational materials may be found. Learn More