Although the number of schools implementing schoolwide positive behavior supports (SWPBS) has increased dramatically, the inclusion of students with severe disabilities in these efforts remains negligible. This article describes the evolution of positive behavior intervention and supports into the SWPBS approach used in many schools today, highlighting the impact on, and inclusion of, SWPBS on students with severe disabilities. In particular, implications for researchers are addressed, including the appropriateness, accessibility, and availability of SWPBS for students with severe disabilities, and the potential of SWPBS to facilitate inclusive schools.