“…Discrepancies in the participation of structured STEM-focused OST programs at eighth grade, selfefficacy beliefs in science and ninth-grade GPA in math, and interest in STEM major between students of different sociodemographic backgrounds were documented in our study. The way that high school girls tended to have a lower science self-efficacy early in high school and interest in STEM major after high school graduation yet a higher ninth-grade GPA in math implies the looming structural and contextual inequity, under which adolescent girls may be less likely to be interested in or aspire to STEM fields (Ashcraft, Eger, & Scott, 2017;Hur, Andrzejewski, & Marghitu, 2017;Xie, Fang, & Shauman, 2015). Prevailing stereotypes regarding the innate math ability, learning experience, and career environment in STEM fields, despite their comparable or even better academic achievement in math early on (Harackiewicz et al, 2014;Sax, 1996) may also play a role.…”