In 1987, The U.S. Secretary of Education embarrassed the city of Chicago by calling its public schools the worst in the nation. Chicagoans may have been tempted to brush off that observation as heavy-handed Washington bluster. But, the secretary was only repeating what civic leaders, educators, parents, and students there already knew: the city's schools were failing, and they desperately needed fresh resources, organization, ideas, and purpose. Over the next decade, Chicago underwent the most ambitious school reform effort in history, becoming a huge laboratory for school reform innovations in areas such as governance, leadership, accountability, and community involvement. Along the way, there were many notable successes, spectacular flops, and lessons learned.