Lower self-efficacy among students from lower income families may have negative impacts on student success, such as discrepancies in test scores, high school graduation rates, and college graduation, as these students lack the self-confidence and social persuasion to achieve academic success. The purpose of this qualitative intrinsic case study is to describe how low achieving, lower income high school students at a selected high school in North Florida experienced the Advancement Via Individual Determination (AVID) program. The study employed Bandura's (1999) theory of self-efficacy and constructs (mastery experience, vicarious experience, social persuasion, and physiological and emotional states), which explores how an individual's confidence in pursuing and accomplishing a task affects the outcome of the task. Data sources included academic history documents, qualitative interviews from 16 participants, and observation field notes. Themes emerged from the triangulated data to address the four theory-driven research questions. Themes related to mastery experience included AVID expectations and academic preparation. Peer support was a theme for vicarious experience. Peer support, teacher support, and social influence were themes for social influence. Responsibility was a theme for physiological and emotional states. The findings indicate that through the AVID program, lower income high school students learn goal setting strategies and understand the importance of education. The AVID program supports and inspires students to attain life success. The support and learning strategies taught in the AVID program benefited this study's participants. I recommend further research to investigate how the AVID program influences students from varying ethnic backgrounds. [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.]