Tombari, M. (2008).Colorado HIPPY evaluation — 2008 study 2: Progression of learning (skills taught continuously throughout the HIPPY curriculum). Denver, CO: Partnership for Families and Children. Model(s): Home Instruction for Parents of Preschool Youngsters (HIPPY)® Does not pass screens Screening conclusion: Ineligible study design Study reviewed under: Handbook of Procedures and Standards, Version 1