Monthly Archives: July 2012

Where have we come from and where are we going?

While on sabbatical during the winter semester of 2012, I began drafting a free, open-source calculus text.  I undertook the project in part because I felt like there wasn’t an activity-driven text available, as well as because I don’t think anyone should make millions by selling a calculus text. The book that is underway is […]


Several professors at the US Naval Academy have an ongoing project of developing in-class and out-of-class activities and projects for students.  CAPABLE stands for Calculus Acquisition through Project and Activity Based Learning.  Check them out at, including the link to “syllabus by day”, for a host of possible activities and projects.

Talk at Mathfest: “Toward a Freer Calculus”

I am speaking at Mathfest in Madison, WI, this Friday, August 3, at 1:45 in Meeting Room Q, as part of the contributed paper session on Teaching or Learning Calculus.

Sample Chapter of Active Calculus

In preparation for having some people pilot the text for differential calculus this fall, I am in the process of some final editing before posting the first four chapters of the text.  For now, you can find chapter 1 (along with the table of contents and preface) at  Alternatively, the link is posted on […]

Geogebra and Marc Renault’s calculus applets

One of my favorite programs is Geogebra.  I discovered it years ago when one of my students was submitting superior graphics in a geometry class in typeset work; I asked her what software she was using and how she found it.  She said “Geogebra.  I just googled ‘free geometry software’.” Duh. Geogebra keeps getting better.  […]

Project MOSAIC and M-casts

Last week I had the privilege of dropping in on part of the MAA PREP Workshop at Calvin College that was led by Randy Pruim (Calvin), Nick Horton (Smith), Eric Marland (Appalachian State), and Danny Kaplan (Macalester) that was connected to their ongoing Project MOSAIC (  The focus of their project is promoting more modeling, […]