<p>On June 24-25, 1999, the Committee on Integrating the Science of Early Childhood Development of the Board on Children, Youth, and Families of the National Research Council/National Academy of Sciences and the Institute of Medicine convened a workshop for researchers and practitioners to examine the underlying knowledge base that informs current best practices in early childhood services, from the prenatal period to school entry.</p> <p><i>Early Childhood Intervention</i> discusses the diversity of working assumptions, theories of change, and views about child development and early intervention that currently shape a wide variety of social policies and service delivery systems for young children and their families.</p>