This study examined the effect of attending Pre-K 4 SA on students' educational achievement in third and fourth grades. Pre-K 4 SA is a high-quality pre-kindergarten (pre-K) program in San Antonio that meets all quality standards defined by the National Institute for Early Education Research (NIEER). The results showed that distance to Pre-K 4 SA centers was negatively associated with child enrollment in Pre-K 4 SA over the assigned neighborhood pre-K program. This result indicated that parents who lived farther away from the centers might face higher opportunity costs, information costs, and transportation costs, making the Pre-K4SA option less appealing over other local options. The authors also found that students by attending Pre-K 4 SA increased 0.3 (first cohort) and 0.6 (second cohort) standard deviations of STAAR reading test scores for the first and second cohorts, respectively, and 0.5 standard deviations of math test scores in third grade for both cohorts. Additionally, Pre-K 4 SA students were predicted to have larger impacts on their reading and math test scores in fourth grade than those in third grade, showing that the impacts on test scores were sustained and even growing for an additional year. On the other hand, the authors found none or some negative impacts on student behavioral outcomes.