“…These models address the prevention of problem behavior and promotion of social competence in young children, and are portrayed as a pyramid with three tiers of increasing intervention intensityTier 1, Tier 2, Tier 3 (Dunlap, Ester, Langhans, & Fox, 2006;Fox, Dunlap, Hemmeter, Joseph, & Strain, 2003;Stormont et al, 2007). Multiple publications and training materials have provided guidance on the implementation of these models in early childhood settings (e.g., Benedict, Horner, & Squires, 2007;Fox, Carta, Strain, Dunlap, & Hemmeter, 2010;Frey et al, 2010;Hemmeter, Fox, Jack, Broyles, & Doubet, 2007). These studies report positive child outcomes (e.g., reductions in problem behavior, increases in social competence) and program outcomes (e.g., improvements in program quality and teacher skills, reduction of child referrals for mental health intervention).…”