This report provides results from the evaluation of the costs, benefits, and returns on investment associated with the Pre-K 4 SA initiative in San Antonio. Recent evaluations have shown that children who received Pre-K 4 SA’s full-day, yearlong pre-kindergarten education exhibited improved attendance, reduced grade repetition, lower special or remedial education placement, and higher test scores relative to demographically similar students who have not attended Pre-K 4 SA (Decker-Woodrow et al., 2018, 2019; Villarreal, 2019). (author abstract)