Part I, which covers the theoretical aspects of constructivism, includes chapters from Ernst von Glasersfeld, Catherine Twomey Fosnot, and Paul Cobb. In Part II, Candace Julyan, Eleanor Duckworth, Deborah Schifter, June S. Gould, Rheta DeVries, Betty Zan, and Maxine Greene provide perspectives from the field. Part III, which explores practices in the classroom, features work from Jill Bodner Lester, Susan Cowey, George Forman, Dewey Dykstra, Jr.