The purpose of this study is to investigate how Harmony Public Schools' (HPS) ' Class of 2024 high school students' current selves (high school experience, math and science efficacy, parent, and teacher expectations) affect to possible future selves (i.e. choosing a science, technology, engineering, and mathematics [STEM]-major in college). 1464 tenth grade students participated in the study. We utilised logistic regressions for the study. It was found that males are 1.9 times more likely to consider STEM majors in college. African American students are least likely to choose STEM majors compared to all other ethnicities. Students who had STEM professional relatives are more likely to choose a STEM major in college. Students with higher self and parent encouragements are 1.2 and 1.3 times more likely to select a STEM major after graduation, respectively. Students with more STEM club participation, more STEM competitions (e.g. science fairs, mathematics Olympiads etc.), and higher GPA scores are more likely to plan majoring in STEM areas in college compared to less of each. Finally, students with higher math self-efficacy and science self-efficacy scores are 1.3 and 1.5 times more likely to choose a STEM-related area in college compared to students with lower math and science self-efficacy scores.