This paper describes the presentations made at a symposium of behavioral scientists conducting research on school disorder and delinquency prevention. The application of a climate assessment battery in organizational development and the evaluation of disciplinary programs in schools is described. The "Effective Schools Battery" (ESB) produces climate profiles to diagnose school problems, suggest improvement ideas, and monitor progress, based on questionnaires completed by teachers and students. Profiles of illustrative schools are shown, and the implications of these assessments for program design are discussed. Selected results from the evaluation of the U.S. Office of Juvenile Justice and Delinquency Prevention (OJJDP) program are presented to illustrate the application of the ESB in program evaluation. Finally, the implications of knowledge gained from evaluation of the OJJDP program are contrasted with the recently emerged "get tough" approach to school discipline. (TE)