Underrepresented students who develop a positive science identity will continue science, technology, engineering, and mathematics (STEM) pathways. Educators can use culture to guide students toward STEM. Military-connected schools have the uniqueness of diversity and international locations and cultures. The problem is the low rate of enrollment of underrepresented student groups in DoDEA upper-level high school (STEM) courses compared to White military-connected school students. The purpose of this basic qualitative study was to describe STEM educators' and parents' influence on the enrollment of underrepresented high school juniors and seniors in STEM courses at a military-connected school. A gap in the current literature is that no identified research existed that had investigated STEM retention of underrepresented, military-connected students. Culturally responsive teaching provided the framework to understand how STEM educators and parents perceive and describe the curriculum and instructional shifts that develop students' positive science identity and STEM pathways. The questions that guided the study cover how adult influencers describe the instructional influence and use of student culture on the enrollment of underrepresented high school juniors and seniors in STEM courses at a military-connected school. Fifteen adult influencers, 10 STEM educators and five parents of graduates, participated in the study. Data were collected using an interview protocol and analyzed using thematic analysis to examine and code responses. STEM representation should be reflected in the classroom with fidelity. Purposeful connections to students' lived experiences can be made through gender-racial representation, community outreach, and promoting STEM opportunities. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]