In fall 2018, the Nevada Department of Education (NDE), in collaboration with Nevada’s Positive Behavior Interventions and Supports (PBIS) Technical Assistance Center, was awarded a second five-year federally-funded School Climate Transformation Grant (SCTG). Funded through this grant, the Nevada MTSS project seeks to improve its capacity to establish, scale-up, and sustain multi-tiered behavioral frameworks in Nevada’s schools through the implementation of School-wide Positive Behavior Support (SWPBS). This report presents program evaluation findings for Year 3 (2020–21) of the grant.