Find and Evaluate Open Educational Resources (OER)

The resources on this page have been compiled by NC State University librarians to assist faculty members in locating high-quality Open Educational Resources for Alt-Textbook Project grant proposals and general use in the classroom. 

The repositories highlighted provide high quality OER such as textbooks, courseware, presentations, assignments and much more. Each repository contains resources from a variety of different disciplines. Some of these resources also provide evaluative information about OER, such as in-depth reviews, statistics and ratings.

Find Open Textbooks

Open Textbook Library

  • A searchable catalog of free open textbooks developed by the University of Minnesota’s College of Education and Human Development. Textbooks are reviewed by contributing faculty to ensure quality. All textbooks are available under various Creative Commons open-content licenses. 
  • The Open Textbook Library is supported by the Open Textbook Network, an alliance of higher education institutions devoted to access, affordability, and student success through the use of open textbooks. NC State is a proud member of the Open Textbook Network.


  • Part of Rice University, OpenStax publishes high quality, peer reviewed, openly licensed free college textbooks and low cost courseware. OpenStax has particularly strong content for introductory level college courses and is widely used across fellow Research 1 universities. 

BCCampus Open Textbooks Collection

  • The British Columbia Campus Consortium's OER repository, BCCampus OpenEd provides textbooks from a variety of resources, including works authored by BC postsecondary instructors.

Pressbooks Directory

  • Pressbooks is a popular OER-authoring tool. This directory connects you to all the text-based media published with Pressbooks.


  • LibreTexts is a user-friendly platform whioch allows you to both view and adopt OER from elsewhere but also author, customize and disseminate your own works. LibreTexts is multidisciplinary, but is particularly strong in the sciences and humanities. 

Find Other Types of OER

OER Commons

  • Developed by the Institute for the Study of Knowledge Management in Education, OER Commons is a freely accessible online collection of open educational resources. This fully searchable catalog includes hundreds of open textbooks for use in higher education. 
  • Unless noted otherwise, all site content is freely available under a Creative Commons non-commercial license. 

Merlot II

  • An initiative of the California State University system, Merlot is free peer reviewed collection of educational materials meant for use in higher education. 
  • The collection consists of tens of thousands of discipline-specific resources, course assignments, and contributor comments to guide instruction. 

Open Educational Resource Community Websites