Core universal, or Tier 1, practices include intentional efforts to prioritize belonging and connection for all, clearly codefining and teaching schoolwide and classroom expectations, developing systems of acknowledgment and appreciation, and clearly defining instructional and supportive responses to behaviors that do not align with established expectations and values.
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U.S. Secret Service National Threat Assessment Center and the Center on PBIS. (2025). Aligning Behavioral Threat Assessment and Management with a Multi-tiered System of Support: Building a Continuum of Prevention and Intervention (p. 25). Claim p025-02, NCIER Claim Map. https://www.ncier.org/research/claim-maps/k12-btam-mtss/claims/p025-02
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