“…As a school-wide initiative, it embraces three principles: (a) promoting evidence-based practices, (b) supporting change at the systems level, and (c) building local capacity to sustain effective practices over time (Coyne, Simonsen, & Faggella-Luby, 2008;Sugai & Horner, 2006). A few early childhood sites have begun to conceptualize and implement positive behavior support initiatives based on the same fundamental principles of SWPBS, and the appropriateness of the approach in early childhood contexts has been examined (Frey, Boyce, & Tarullo, 2009;Lewis, Beckner, & Stormont, 2009;Muscott, Pomerleau, & Szczesiul, 2009). Because most preschool classrooms are not organized within a school building, the extension of SWPBS to the preschool level is commonly referred to as program-wide positive behavior support (PWPBS; Frey, Young, Gold, & Trevor, 2008;Hemmeter, Fox, Jack, & Broyles, 2007;Muscott, Mann, Lapointe, & Lane, 2005;Muscott, Pomerleau, & Dupuis, 2009;Stormont, Lewis, & Beckner, 2005).…”