The purpose of the SWPBIS Tiered Fidelity Inventory (TFI) is to provide a valid, reliable, and efficient measure of the extent to which school personnel are applying the core features of school-wide positive behavioral interventions and supports (SWPBIS). The TFI is divided into three sections (Tier 1: Universal SWPBIS Features; Tier 2: Targeted SWPBIS Features; and, Tier 3: Intensive SWPBIS Features) that can be used separately or in combination to assess the extent to which core features are in place.