This paper presents preliminary assessment data on initial training and implementation of a statewide system of positive behavioral interventions and supports (PSIS) in New Hampshire. PBIS is the systematic organization of school environments and routines that enable educators to increase the capacity to adopt, use, and sustain effective behavioral practices and processes for all students. Preliminary results indicate that schools can be trained and supported in developing effective schoolwide approaches through a statewide initiative as 15 of the 28 schools (54%) in Cohort 1 achieved implementation of schoolwide discipline procedures. Broken down by level, 75% of the multi-level schools, 62% of the elementary schools, 50% of the middle schools, and none of the high schools met the criterion. Implications for policy practice, and research are discussed.