Astronomy, Earth Science, Geology Textbooks-OER Only

The AIM seeks to encourage the adoption of open source and open access mathematics textbooks. The AIM Editorial Board has developed evaluation criteria to identify the books that are suitable for use in traditional university courses. The Editorial Board maintains a list of Approved Textbooks which have been judged to meet these criteria.

A service to provide OER from State University of New York, these textbooks are free and open to all institutions. Browse available titles or the SUNY catalog to find learning materials suitable for your courses. You can link to our page, or you can upload the PDF or ebook in your LMS.

Lumen Learning’s mission is to enable unprecedented learning for all students by providing affordable course materials designed to strengthen learning using open educational resources (OER). Applies learning science insights and learning data analysis to develop improvements to our course materials and learning tools.

A Non-profit with the mission to create free introductory textbooks. Strong in Math.

The Open Course Library (OCL) is a collection of shareable course materials, including syllabi, course activities, readings, and assessments designed by teams of college faculty, instructional designers, librarians, and other experts. Some of our materials (also called open educational resources, or OER) are paired with low cost textbooks ($30 or less).

CUNY Academic Works is a service of the CUNY Libraries dedicated to collecting and providing access to the research, scholarship and creative work of the City University of New York. In service to CUNY’s mission as a public university, content in Academic Works is freely available to all.

The Center for Open Educational Resources & Language Learning (COERLL) is one of 16 National Foreign Language Resource Centers (LRC's) funded by the U.S. Department of Education. The overall mission of these federally-funded centers is to improve the teaching and learning of foreign languages by producing resources (materials and best practices) that can be profitably employed in a variety of settings.

A source for ready-to-adopt open textbooks. Algebra, Calculus, Statistics. Even the "Liberal Arts" offereings are math books.