This longitudinal study examines the long-term impact of critical pedagogy on the academic and social development of students from a marginalized Mexican American borderland community, with a specific focus on their trajectories in STEM (Science, Technology, Engineering, and Mathematics) fields. Drawing on in-depth interviews with three students who participated in a critical pedagogical approach during their formative elementary years, this case study explores how power, agency, and curiosity were cultivated in the classroom and how these elements influenced the students’ pursuit of higher education and careers in STEM ten years later. The findings reveal that an equitable distribution of power and the fostering of student agency through critical-based pedagogies empowered students to engage critically with their learning and to challenge systemic barriers. Furthermore, this study highlights the role of early curiosity in sustaining students’ interest in STEM, despite encountering obstacles in higher education environments dominated by market-driven influences. By situating this research within the broader context of critical pedagogy and its emphasis on social justice, the study underscores the transformative potential of education in shaping the futures of minoritized students in STEM disciplines.