This qualitative action research study sought to explore and enhance the academic self-efficacy of Black and Hispanic students in urban high schools. The study aimed to uncover the factors contributing to low academic self-efficacy among Black and Hispanic STEM students and develop an actionable plan to address these issues. In Cycle 1, high school STEM administrators, educators, and college students participated in semi-structured interviews. Analysis of the data gathered from these interviews revealed negative preconceptions about STEM, as well as the need for representation and further improvement in instructional pedagogy to enhance the self-efficacy of Black and Hispanic students in STEM. Building upon the insights gained from Cycle 1, Cycle 2 consisted of four sessions to formulate a comprehensive resource guide to enhance the academic self-efficacy of Black and Hispanic students in STEM. This guide was crafted to equip educators, students, and administrators with the necessary tools to support Black and Hispanic students in STEM fields. The evaluation centered on assessing the resource guides' potential effectiveness in improving the academic self-efficacy of Black and Hispanic students in STEM. Cycle 2's findings revealed the resource guide's potential to offer educators opportunities for curriculum enhancement, foster access to a future in STEM, and extend its impact beyond the classroom. The study's findings underscored several critical implications for the organization, emphasizing the need for heightened support for Black and Hispanic students in STEM, creating a nurturing learning environment, and the urgency of addressing the challenges confronting Black and Hispanic students in STEM fields. It offers a practical resource guide for enhancing their academic self-efficacy. [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.]