This study examines the impact of a university-high school debate mentoring program on educational outcomes of high school graduates attending a racially segregated school in New Jersey, USA. Evidence shows that from 2011 to 2018, participants had stronger grade point average growth, higher cumulative grade point averages, and higher SAT scores relative to non-debating graduates. The sample (N = 275) consists of 55 high school graduates who competed on the debate team and a control group of 220 non-debating graduates. Findings indicate debate graduates experienced a 0.81 GPA growth (2.5-3.31) from 9th grade to 12th grade while non-debate graduates exhibited a markedly lower 0.10 GPA growth (2.2-2.3). Debaters scored higher on particular sections of the SAT exam and overall SAT scores. The study provides evidence of the potential efficacy of debate team membership on student outcomes.