Success for All is a comprehensive reform model for elementary school that combines state-of-the-art curriculum, research-based instructional methods, assessments, and professional development with one-to-one tutoring, extensive family support services, and other strategies to ensure that every child is successful in the early grades and then builds on that success throughout the elementary years. Started in 1987, it is the most widely used of all reform designs. It is currently in about 1800 schools serving more than a million U.S. children, mostly in high-poverty schools. It is also the most extensively researched comprehensive reform program, with two dozen evaluations carried out in eight research institutions. Success for All: Research and Reform in Elementary Education is the first edited volume presenting research on Success for All in the U.S. and in five other countries for which the program has been adapted. This book presents a description of Success for All, an overall summary of all achievement studies, reviews of research, original presentations of new research, and discussions of the impacts and the implications of this research and dissemination for educational policy and practice in many arenas.