This page lists major indexes and repositories of college level open access textbooks and other course materials. The majority of these materials are issued under a Creative Commons license, and are freely accessible to both instructors and students. OER aim to reduce the cost of textbooks to students while providing high-quality, expert-developed learning and instructional materials.

Navigate to the desired subject category on each site to locate materials that may be suitable for your courses, and contact your liaison librarian for assistance.

  OER Commons
A vast database containing thousands of open educational resources, curated from a wide variety of creating institutions, and organized by subject area and material type. Contains full courses, modules, lessons, etc., in addition to textbooks. Funded by nonprofit ISKME.

A project based at Rice University that develops open access textbooks. All content is unique to the OpenStax site. Offerings are primarily in mathematics and the sciences.

  Open Textbook Library
A large, well-organized collection of open textbooks assembled by the University of Minnesota. Textbooks are drawn from a variety of sources, and records include instructor reviews.

  Open SUNY Textbooks
Open textbooks created to support Open State University of New York (SUNY) curriculum.

Openly Available Sources Integrated Search (OASIS) is a search tool that aims to make the discovery of open content easier. OASIS currently searches open content from 64 different sources and contains 160,546 records. OASIS is being developed at SUNY Geneseo's Milne Library in consultation with Alexis Clifton, SUNY OER Services Executive Director.

  MIT OpenCourseWare Textbooks
Index to MIT textbooks and materials used by OpenCourseWare classes.

A veteran player in the open education movement, MERLOT provides a single interface to search their own collection, other collections, and the web at large for open textbooks and other materials. The site also serves as a hub for open educational content developers and instructors. Project hosted by California State University.

  DOAB (Directory of Open Access Books)
Index of open access books of all kinds

  Follett Discover  Access Instructions
Follett Discover the University Shop's textbook adoption system has partnered with several OER and low cost digital content providers (openstax, Merlot, KhanAcademy, Lyryx, Lumen, OCWSearch, Coursera and Nature). Discoverability is facilitated by an OER checkoff. Selected OER content can be seamlessly delivered to the learning management system.

  Mason OER Metafinder
George Mason University Libraries search across multiple OER content providers.

  Pressbooks Directory
Search the universe of OER books published with Pressbooks.

Collection of open content textbooks across a wide range of subjects and audience levels.