Opportunity gaps between minority and white students and between genders has thus far prevented the concept of an equitable school with equitable opportunities. One important measure of educational equity is participation in Advanced Placement (AP) classes. If both the overall availability of AP courses and achievement within AP courses are increasing while certain subgroups of students, specifically Latinx students, are still lagging far behind in terms of enrollment, more needs to be done to address possible reasons for the disparity. The purpose of this study is to examine innate and environmental protective factors possessed by Latina high school students at an urban high school in New England as they contribute to the resiliency that allows them to stay in a track where they can eventually enroll in Advanced Placement (AP) mathematics courses. Using Resiliency Theory, this narrative study sought to answer the following central research question by interviewing high school Latinx students who have persisted and succeeded in an AP mathematics course: What are the innate traits and lived experiences of Latina students who have successfully completed an AP level mathematics course that have helped them to develop resilience? Findings from this study identified several innate protective factors, including math confidence and knowledge of the Advanced Placement system and several environmental protective factors, including having supportive family members, at least one supportive teacher, a cohort of with whom students to travel from class to class, and being singled out for a specific academic trait, that contributed to their enrollment in in Advanced Placement (AP) mathematics courses. Implications for practice and future research are discussed. [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://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]