Our textbooks

Active Prelude to Calculus, Active Calculus, and Active Calculus Multivariable are free, open-source texts designed for an active learning experience for students. In addition to the textbooks themselves, we offer a wide range of ancillary materials for instructors. Learn more about each text via links in the main menu above, including information about free PDF version and how to purchase print copies. Each book is freely available in HTML (that can even be read on a smartpone); follow a “read online” button below to try it.

Every section of each text

  • has engaging activities for students to complete before and during class;
  • offers additional exercises that challenge students to connect and assimilate core concepts;
  • includes anonymous interactive WeBWorK exercises;
  • and helps students develop conceptual understanding and improve their skills at communicating mathematical idea.

There is an active Google Group for instructors who use one or more of the three texts; there are more than 500 members of the group who share ideas and resources to support teaching from Active Prelude, Active Single, or Active Multi. At the Instructors link in the main menu above, you can learn more about resources for instructors and how to join the Google group.

Each text carries a Creative Commons BY-SA license that allows users to clone, fork, and modify the GitHub source, provided they give attribution and share the results of their work freely.