OpenStax offers free digital textbooks and affordable teaching technology for high school and college, helping educators save time and support student success.

Peer reviewed, openly licensed, and totally free online! OpenStax textbooks come with free, aligned student and instructor resources. Explore our library of resources and decide what …

Science - OpenStax ... Science

Learn about human anatomy and physiology online by downloading OpenStax's free Anatomy and Physiology 2e book and using our accompanying study guide.

Study calculus online free by downloading volume 1 of OpenStax's college Calculus textbook and using our accompanying online resources.

This free textbook is an OpenStax resource written to increase student access to high-quality, peer-reviewed learning materials.

Access free, peer-reviewed math textbooks and resources for students and instructors from OpenStax.

Interested in learning more about OpenStax? We're an OER publisher on a mission to improve access to education by publishing free textbooks online.

Dec 24, 2025 · OpenStax digital textbooks are free to access on openstax.org or as downloadable PDFs. For the screenshots below, we'll use OpenStax College Success as an example.

Study biology online for free by downloading OpenStax's college Biology 2e book and using our accompanying online resources including a biology study guide.