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Math Research Guide

Open Textbooks Options for CU Math Courses

Open Access Textbooks

The American Institute of Mathematics has approved a number of open textbooks. The American Institute of Mathematics (AIM) evaluates and recommends open textbooks for courses ranging from pre-calculus to upper division analysis and algebra.

American Institute of Mathematics List of Approved Textbooks



undefined MATH 111 College Algebra and Trigonometry

 CC BY-NC-SA --  [What does this mean?]


undefined Linear Algebra with Applications





undefined Active Calculus 2.0



undefined Active Calculus Multivariable


Open Supplementary Material for CU Math Courses

What Are Open Educational Resources?

Open Educational Resources (OER) are educational materials that are freely and openly licensed for use by anyone, at any time, anywhere. The frequently quoted definition of OER by David Wiley includes the right to retain, reuse, revise, remix, and redistribute content.

The 5R Permissions of OER


  • Make, own, and control copies of the content (e.g., download, duplicate, store, and manage)


  • Use the content in a wide range of ways (in a class, in a study group, on a website, in a video)


  • Adapt, adjust, modify, or alter the content (translate, reorganize, reformat)


  • Combine the original or revised content with other material to create something new (mashup, anthology, package)


  • Share copies of the original content, your revisions, or your remixes (give a copy to a friend, share online)
This material is based on original writing by David Wiley, which was published freely under a Creative Commons Attribution 4.0 license at

Why Adopt OER in Your Classroom?


OER are receiving growing support as permissions are the clear, easy-to-understand. Many OER use Creative Commons Licenses, which specify the ways you are legally allowed to access, download, use, revise, and share the materials you need.

Innovation and Collaboration

Because OER are freely shared with others, there is a growing network of resources that instructors may draw upon to use in their courses - many of which have already been adopted and extensively reviewed by other instructors in your field. Since OER allow for revision and sharing in most cases, you have a greater capacity to build upon the works of others - customizing and combining resources to create innovative course curriculum.

OER also provide ample opportunities for ongoing collaboration between different individuals, departments, and institutions, in order to build truly unique materials.


One of the strongest supports for the adoption of OER has been the cost benefits for students. The College Board estimates that the average student in the United States will spend up to $1220-$1420 a year on their required course materials. As many as 65% of students admitted that they had deliberately chosen not to purchase their course materials, due to the cost involved. Additionally, as many as 48% of students reported that textbook costs impacted how many and which their course enrollment decisions.

This translates to is a growing number of students who either cannot, or choose not to purchase their course materials - leaving them without the information necessary to be successful in their coursework. It also leads to empty chairs in classrooms due to students dropping courses that they cannot afford. Open Educational Resources are an excellent solution to the rising cost of course materials, as they are free resources available to all, guaranteeing 100% of student will have access, almost instantaneously.