This brief summarizes research that studies the Zones of Choice (ZOC) program, an ongoing initiative of the Los Angeles Unified School District. The research investigates the mechanisms through which the ZOC program may have improved student outcomes and finds that changes in schooling practices played a role. Specifically, schools in the ZOC program experienced an uptick in suspensions, suggesting that these schools pivoted toward a schooling practice related to the no-excuses approach to urban education, which research has shown elevates the outcomes of black and Latino children in other settings. This research analyzes the rank-ordered preference lists of schools submitted by parents participating in the ZOC program and finds that parents place a higher weight on school effectiveness compared with other school characteristics, including a school's student body. This finding supports the notion that parents' choices provide schools with incentives to improve student learning, especially given recent evidence that families' beliefs about school quality are close to reality. This result contrasts with evidence that parents care more about the characteristics of a school's students and with evidence that lower-income families are even less sensitive to school quality. [This research brief is based on Christopher Campos and Caitlin Kearns, "The Impact of Public School Choice: Evidence from Los Angeles's Zones of Choice," "Quarterly Journal of Economics" (October 10, 2023).]