These 27 actual case studies (plus two quick-hitting research chapters) provide practical, down-to-earth, hands-on strategies that teachers, supervisors, and administrators in all sorts of settings can use to improve their professional operation through the gradual use of constructivist practices. They point to the increased personal and professional satisfaction teachers experience and to students' increased achievement and satisfaction that results when practitioners pull off constructivist processes. Additionally, these cases tell how to do it safely.