This book's title, I Used to Think . . . And Now I Think . . ., is borrowed from an exercise often used at the end of teacher professional development sessions, in which participants write down how what they've learned has changed their thinking. The resulting essays model the ongoing process of reflection and growth among those deeply committed to this work.

In this compact volume, Richard F. Elmore invites leading educators at every level of school reform--teachers, administrators, policymakers, school founders, community organizers, union leaders, teacher educators--to...