This is why I only use ten percent of my textbook's printed pages: The text has already imposed a rigid, powerful framework around an interesting drawing of a ski-lift. It has labeled the points, scaled the axes, and written the questions. The textbook has told my students how to care. The … Continue reading →

Lately I am a man obsessed. As others are obsessed by numerology, the year 2012, or the birth certificate of President-elect Obama, I am obsessed by the Rule of Least Power and how succinctly it explains why I have never found the right place for a textbook — any textbook — in my math … Continue reading →