Very excited to be at the American Institute of Mathematics in San Jose, CA, to spend a week at the workshop on free & open textbooks, MathBook XML, and all sorts of emerging options.  Three things are totally clear from the outset: It’s an amazing group of 25-30 people here.  So many cool projects, smart […]

Happy New Year everyone.  Here are a couple of brief updates if you are planning to use Active Calculus in the upcoming winter semester. Thanks to everyone who sent us errors they found in the text, as well as other suggestions.  Steve has updated the multivariable version of the text to fix all known errors, […]

This post on the Chronicle’s site basically speaks for itself:  a text, written by the dept chair, was used for 25 years and had “never been questioned“.  When a faculty member tried to do otherwise, he was disciplined. All I can say is:  good grief.  Update:  via Adam Glessner, there appears to be much more to […]

One of the organizers of this MOOC just reached out to me and asked that I share information about this free online course:  see the interesting trailer at  I love that there are people willing to share more about the subject with interested people for free, and to talk about it ways that share how […]

In the same way that publishers take advantage of students’ captivity when it comes to needing textbooks, Texas Instruments does the same.  Here’s a fantastic article on the subject that quotes a PA HS teacher who says “But you feel dirty, because you’re telling parents they need to buy a device, and I know I […]

An overdue addition for Active Calculus (single) and the addition to AC Multivariable that prompted it:  errata pages for both. You can find a list of currently identified errors in each text at these links:  single variable, multivariable. Of course, if you find errors that need to be added to either page, please contact me.

In recent recommendations from Amazon, based on my prior reading and buying, I got an email suggesting that I buy James Stewart’s Calculus text.  Heh. The 7th edition, no less:  At least you can rent it for $50 for the semester. These annual complaints about textbook costs are at least getting shorter.