The Pacific Southwest Mental Health Technology Transfer Center (MHTTC), in collaboration with the OSEP Technical Assistance Center on Positive Behavioral Interventions and Supports (PBIS), has developed a three-part series of fact sheets to deepen knowledge and understanding of the ISF. All three documents provide case examples that highlight the local context in which data-based decision making occurs and reflect the diversity of school communities in the region. This particular factsheet provides an introduction to Interconnected Systems Framework, including a definition and a review of the benefits.