Active Prelude to Calculus, Active Calculus, and Active Calculus Multivariable are free, open-source texts designed for a more active learning experience for students. Every section of each text has engaging activities for students to complete before and during class, as well as exercises that challenge students to connect and assimilate core concepts. The HTML version of each text offers anonymous interactive WeBWorK exercises, select interactive graphics, and full-color static graphics. Inexpensive print versions are available for purchase from Amazon. You can learn more about the features and ancillary materials for each text by clicking on "learn more" for any text of interest above. You can also request to join the Active Calculus Users Google group for instructors, a low-traffic listserv for discussion among instructors who use one or more of our textbooks.

Active Prelude to Calculus, Active Calculus, and Active Calculus Multivariable are written in PreTeXt, a free and open-source authoring platform for creating the next generation of textbooks. PreTeXt generates beautiful HTML output that is readable on a smartphone and meets most user accessibility requirements.

We also maintain an online archive of past editions from 2017 forward. The most current version of each text will always be found on this page.