Open Educational Resources

American Institute of Mathematics (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. 

iLumina Undergraduate teaching materials that includes mathematics.

myOpenMath MyOpenMath runs on the open source, IMathAS platform, providing free hosted use of this platform in support of free, open textbooks like the ones listed on OpenTextBookStore.com. The intent is to provide classroom use of the platform, without any required cost to students, for schools wanting a managed install of the IMathAS platform, and to provide students self-study opportunities.

Open Textbook Initiative  "The list is organized by courses ranging from pre-calculus to upper division analysis and algebra.  Each book has a brief description of its important features and information about how to get it." Math textbooks evaluated and approved by the American Institute of Mathematics.

PHET Math concept and application interactive simulations

Rover by OpenStax "Affordable online math homework with step-level feedback to support your students and detailed analytics to support your teaching. Only $22 per student per course provides full access until students pass the course. Rover by OpenStax is available now with our Algebra and Trigonometry, Precalculus, and College Algebra books."