This study describes the uses of several disciplinary practices in American public schools. They include positive reinforcement, tokens, assertive discipline, timeout, values clarification, life span interviews, behavior charts, conferences, detention, remaining after school, inschool suspensions, out-of-school suspensions, and exclusion. Three hundred and seventy-one principals in 18 randomly selected states representing the 9 United States Census districts received a school discipline survey. Twenty-six school principals (70 percent) returned usage information. Results indicated differential uses of the several disciplinary practices. The study provides and discusses descriptions of the use of these disciplinary practices across general, demographic, and behavioral variables. Implications for personnel preparation are also discussed. (4 tables and 30 references) (KM)