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.

OpenStax College

OpenStax is a nonprofit educational initiative based at Rice University, and it’s our mission to give every student the tools they need to be successful in the classroom. Through our partnerships with philanthropic foundations and our alliance with other educational resource companies, we’re breaking down the most common barriers to learning. Because we believe that a well-educated society profits us all.

We publish high-quality, peer-reviewed, openly licensed college textbooks that are absolutely free online and low cost in print.

Open SUNY Textbooks

Open SUNY Textbooks is a one service of SUNY OER Services, a SUNY service that provides mentoring, technical support, and access to a broad catalog of open textbooks to help incorporate OER into the classroom, lower the cost of higher education, and empower faculty.

  • We offer campuses user-friendly technology to adopt, adapt, and tailor existing OER for individual needs, as well as providing guidance for creating and distributing new materials.
  • We partner with local practitioners for workshops on incorporating OER in the classroom; using and remixing content; and understanding open licensing.
  • We help campuses work with stakeholders, such as student government organizations, to build sustainable practices around OER.
  • We offer assessment practices to measure the change that OER brings.
  • We connect institutions with opportunities for recognition, research, and publication related to OER.

Textbooks for Pressbooks

A plugin that extends Pressbooks for textbook authoring.

Pressbooks is a content management and ‘one button publishing’ system for books.

Textbooks for Pressbooks adds functionality to Pressbooks to make it easier to author textbooks as well. The features it currently offers are:

Textbook Theme
Optional tabbed content (page citations, revision history, book information)
Extended Citation functionality
TinyMCE textbook buttons (learning objectives, key terms, exercises)
TinyMCE spell check
Prominent admin buttons (Import, Plugin)
Annotation functionality
Download links to openly licensed textbooks, ready to remix.
A remix ‘eco-system’ — Search and Import chapters from both local and remote instances of Pressbooks


eCampus Ontario’s Open Education publishing platform. Here you can start creating your own open textbooks, find an existing textbook you’d like to adapt, and start editing, or just find a book you’d like to assign or use in the classroom.

Rebus Press

Find, create, and collaborate on books created by the Rebus Community.
The Rebus Press is a Pressbooks network available to members of the Rebus Community producing CC BY licensed open textbooks.