This report summarizes the activities and achievements of the Office of Juvenile Justice and Delinquency Prevention's (OJJDP) Research Division from August 1999 to the present in the areas of research, evaluation, and statistics. It provides new findings on very young offenders; the causes and correlates of delinquency; juvenile transfers to criminal court; juveniles in corrections; youth gangs; diversion from juvenile court (teen/youth courts and restorative justice programs); and national statistics on juvenile offenders and victims. It also examines new and emerging research efforts (delinquent girls and the initiatives that target female juvenile offenders), research on American Indian and Alaska Native juveniles, understanding and monitoring the "whys" behind juvenile crime trends, and mental health and juvenile justice. Finally, the report presents highlights on evaluations of school-related projects; evaluations of substance abuse programs; child victimization; Pathways to Desistance (a prospective study of serious adolescent offenders); and working with states and communities to improve evaluation and information collection efforts. Three appendixes present data on: active projects, September 1999 to present; OJJDP publications and products from the Research Division; and research-related online resources. (SM)