In this article, the authors provide an overview of empirically supported practices and techniques for monitoring and assessing teachers' use of effective behavior support practices. They focus on how teacher preparation programs, administrators, and supervising teachers provide pre-service teachers with helpful feedback on their teaching performance. In addition, they describe a behaviorally based conceptual model for assessing teachers' fluent and sustained use of empirically supported classroom behavior support practices and provide recommendations for enhancing the preparation of pre-service educators.