Under‐represented minority students leave science, technology, engineering, and mathematics (STEM) majors at high rates. As an intervention, pre‐college summer‐bridge programs have been successful. However, evaluations of existing programs focus on degree attainment and lack information on student experience while in college. Traditional summer‐bridge programs also emphasize ethnic backgrounds and academic under‐preparedness. We report a new summer‐bridge program that aims to address gaps in the literature described above.The new summer‐bridge program is different from traditional programs in significant ways. First, the definition of under‐representation is expanded to include socioeconomic need, first‐generation college student, and multilingualism. Second, the selection criteria focus on demonstrated commitments to promoting diversity and inclusion instead of ethnic backgrounds to avoid activation of stereotype threat. Third, courses are offered at different levels to challenge students regardless of academic preparation. Finally, the program is designed to engage participants in activities that focus on community building, leadership development, and authentic practices in biological research.A quasi‐experimental design with a historical comparison group (n=708) is used to study the effectiveness of this program. To date, three cohorts of participants (n=58) have completed the program. Pre‐ and post‐surveys reveal significant increases in reported help‐seeking, propensity for critical thinking, and knowledge of research process. In focus groups and interviews, participants reported that the program helped them connect with faculty, establish social networks, and become part of the university community. Critically, compared to a historical cohort, participants have higher grades (2.53±0.62 vs. 1.94±0.92, p<0.01) and retention rates (73% vs. 30%, p<0.01) in General Chemistry, the gateway course to many STEM disciplines including biology.Grant Funding Source: Howard Hughes Medical Institute