Data from January -- December 2015, Points indicate user sessions
A growing number of authors have published open source interactive text books using the Runestone Tools. These textbooks are used all over the world.
You don't have to be a textbook author to use the Runestone Tools. Its quick and easy to make your own tutorials, labs, or publish class notes, for your students.
If you are wondering what this is all about, this link will show you all the cool interactive features you can build into your learning materials with the Runestone Tools.