The 1990 reauthorization of PL 94-142, the Individuals with Disabilities Act (IDEA), emphasized the need for applied research in schools to prevent the development of emotional disturbance. Prevention research then led to mandates in IDEA 1997 that schools must develop positive behavior interventions and supports (PBIS) for children and youth…

In this article the authors provide practitioners and researchers with three illustrations of how to use systematic screening tools within the context of three-tiered models of support to (a) measure the overall level of risk present in a school over time and (b) identify students who may require more targeted supports in the form of secondary and…