In 2005, LAUP was instituted to support early care and education centers and family child care homes in highneed areas throughout Los Angeles County. Foremost among our goals has been to ensure that young children are supported, so they can enter school prepared cognitively, socially, and emotionally for long-term success. Following the development of a Master Plan by close to 200 members of an advisory committee, LAUP has: recruited and built sites; funded preschool spaces; provided training and coaching to early educators; provided resources and training to parents; developed and implemented a quality rating system and tiered payment system; advocated for the importance of early education; and developed and implemented various programs to improve the ECE workforce. This summary brings together highlights from several studies conducted by LAUP and independent research agencies Mathematica Policy Research (MPR) and Applied Survey Research (ASR). These highlights focus on outcomes for the children LAUP has served. In general, the findings point to a pattern of positive outcomes for 1) children's cognitive development within their preschool year, 2) children's social and emotional development in preschool, 3) children's health, 4) children's longitudinal academic and social progress, and 5) family engagement. (author abstract)