It’s a long story to get to here. Perhaps in some subsequent posts I’ll fill in the backstory; but for now, here’s where I am.
From January through April 2012 I was on sabbatical from my regular post as a professor of mathematics at Grand Valley State University, during which time I drafted a free, open source calculus text for differential calculus. The main purpose of this blog is to create a forum where people interested in the text can share comments, feedback, ideas, and resources for the betterment of this text. Along the way, hopefully we will collectively contribute to making more and better free resources available to students of calculus, and more and better free and open source calculus materials available to instructors.