Hill M. Walker, Ph D, is Founder and Co-Director of the Institute on Violence and Destructive Behavior and Professor Emeritus in the Department of Special Education and Clinical Sciences at the University of Oregon, and is Senior Scientist at the Oregon Research Institute. The only faculty member to receive the University of Oregon»s highest honor, the Presidential Medal, Dr. Walker is also a recipient of honors including the Distinguished Achievement Award from the Association of University Centers on Disabilities and the Kauffman-Hallahan Distinguished Researcher Award from the Division for Research of the Council for Exceptional Children. His research and more than 175 publications focus on social skills assessment, intervention and curricular development, early intervention and prevention with at-risk children and students, longitudinal research on students with EBD and their families, and behavioral-ecological approaches to school intervention. Frank M. Gresham, Ph D, is Professor in the Department of Psychology at Louisiana State University. He is a Fellow of the American Psychological Association (APA) and of APA Divisions 16 (School Psychology), 5 (Quantitative and Qualitative Methods), and 53 (Society for Clinical Child and Adolescent Psychology). He is a recipient of the Lightner Witmer Award and the Senior Scientist Award from APA Division 16. Dr. Gresham is one of the few psychologists to be awarded Fellow status in the American Association for the Advancement of Science. His research and more than 260 publications address topics including social skills assessment and intervention, response to intervention, and assessment and interventions for students with emotional and behavioral disorders. He is codeveloper of the Social Skills Improvement System Rating Scales.