School-wide behavior management systems can improve academic performance and behavior in middle schools, and they should have positive effects on students with ADHD. Unfortunately, evidence-based, school-wide behavior management systems have not been widely adopted because of problems with feasibility, acceptability, and sustainability. The Deployment-Focused Model of Intervention Development and Testing has been proposed as a promising method of bridging the gap between research and practice settings. A key aspect of the model is to involve the persons most likely to deliver the service (e.g., teachers) in the intervention development process from the very beginning. To illustrate this process, the authors describe the planning and implementation of a school-wide program designed to improve behavior in a public middle school. (Contains 1 figure.)