The RAND Corporation is conducting a multiphase independent evaluation of Big Lift. This brief summarizes results from RAND's descriptive analysis of participation rates and school readiness outcomes for children served in the first year of the initiative by two of the four pillars for which data were available: High-Quality Preschool and Summer Learning. The study specifically examined three topics for the first cohort of entering kindergartners to experience Big Lift services: participation rates in Big Lift services in the prior year, kindergarten readiness indicators overall, and differences in readiness based on the type of early learning experience they had. (author abstract)