Rob Beezer’s free, open authoring platform PreTeXt is what enables the fantastic HTML output for Active Calculus and so many other free, open textbooks.

As part of my work with the PreTeXt Advocacy Group (Sally Koutsoliotas, Jennifer Nordstrom, Bruce Yoshiwara, and me), I’m excited to announce that PreTeXt is featured in the December/January issue of MAA FOCUS; you can read our article on The Future of Textbooks at

The article highlights the new PreTeXt Catalog,
which has over 50 PreTeXt projects — all publicly available, some still in development.  In addition, the new PreTeXt Gallery offers a smaller list of mature exemplars.  All three texts from are in the Catalog, and the single variable text is in the Gallery.  There are many other fantastic texts there for you to consider.

Active Calculus

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.

Active Prelude to Calculus, Active Calculus, and Active Calculus Multivariable are written in PreTeXt, a new free 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.