This collection of papers identifies the leading sources of inequality in public education and proposes public policy remedies. The eight chapters are: (1) "Introduction: Making K-12 Public Education an Engine for Social Mobility" (Richard D. Kahlenberg); (2) "Summer Learning and Home Environment" (Doris R. Entwisle, Karl L. Alexander, and Linda Steffel Olson); (3) "Equalizing Education Resources on Behalf of Disadvantaged Children" (Richard Rothstein); (4) "High Standards: A Strategy for Equalizing Opportunities?" (Adam Gamoran); (5) "Inequality in Teaching and Schooling: Supporting High-Quality Teaching and Leadership in Low-Income Schools" (Linda Darling-Hammond and Laura Post); (6) "Charter Schools and Racial and Social Class Segregation: Yet Another Sorting Machine?" (Amy Stuart Wells, Jennifer Jellison Holme, Alejandra Lopez, and Camille Wilson Cooper); (7) "Unequal Learning Environments: Discipline That Works" (Paul E. Barton); and (8) "Critical Support: The Public View of Public Education" (Ruy Teixeira). (SM)