This brief summarizes empirical research on the effects of Tier 1 PBIS for students with disabilities. In general, when schools implement PBIS with fidelity, students with disabilities experience: (a) improved SEB outcomes and (b) reduced exclusionary discipline (i.e., office discipline referrals, suspensions, restraint, seclusion). Given the promising empirically-supported effects of Tier 1 PBIS, we recommend schools continue to prioritize Tier 1 supports that are inclusive, robust, and supportive of all students, including students with disabilities. [The following author team contributed to this brief: Laura Kern, Katherine Meyer, Barbara Mitchell, Tobey Duble Moore, Ashley Plumb, Robert Putnam, Maria Reina Santiago-Rosario, Sandra Sears, Brandi Simonsen, Kathleen Strickland Cohen, and Kimberly Yanek.]