The Head Start CARES Demonstration, sponsored by the federal Office of Planning, Research and Evaluation in the Administration for Children and Families, tested three approaches to improving the social-emotional competence of preschoolers. In this six-minute video, researchers Pamela Morris and Shira Kolnik Mattera explain why social-emotional development is important, describe the training and coaching that Head Start teachers received in the demonstration, and explain the significance of the findings from the evaluation.