This report describes the impact of a professional development workshop, Five Keys to Successfully Managing Classrooms, designed to help teachers work with at-risk students and better manage problem behaviors in the classroom. The activity was led by an interdisciplinary team of experts in psychology, instructional leadership, and criminal justice who introduced techniques and practices to facilitate improved classroom management. The workshops involved assessing current needs and connecting to technology; communicating to enhance classroom climate and student success; identifying and intervening with substance abuse, domestic violence, gangs, and other disruptive events; maximizing classroom effectiveness through procedures and routines to increase motivation and achievement; and reviewing successes and sustaining gains. Approximately 60 elementary teachers, teacher aides, and administrators from 4 Arizona schools participated in the workshops, which were delivered in 2 half-day segments, approximately 1 month apart. Data from participant interviews, reports, and feedback indicated that participants considered the training beneficial and felt more confident and capable of managing problem behaviors and utilizing effective strategies after the workshop. However, even after the training, teachers still needed additional assistance in utilizing community resources to handle such issues as gang involvement and substance abuse. A complete description of the workshops is appended. (Contains 30 references.) (SM)