After more than thirty years as a college teacher, I have accumulated so many debts to students, colleagues, and friends that I must confine myself here to acknowledging those who have had a direct effect on the writing of this book.
First, thanks are due to the Committee on Public Lectures at Princeton University for the invitation to deliver the Stafford Little Lectures, of which this book is an expansion and elaboration. I am grateful to Peter Dougherty, Hanne Winarsky, and Kathleen Cioffi at Princeton University Press, who waited patiently while I developed the lectures into a book, as well as to the two readers who made invaluable suggestions in response to the manuscript. Joan Gieseke improved the book with her careful copyediting, as did Julie Shawvan, who created the thorough index.
The largest influences on my own classroom practice have been the memorable teachers I encountered as a student, and those from whom I have learned since. I think especially of Phil Schwartz, whom I assisted in an Upward Bound program when I