This study explored the relationship between school culture, teachers’ interest in professional development, and student success in an educational setting. It aimed to describe the levels of these variables and determine their interconnections. The study examined how shared values, leadership practices, and behavioral norms contributed to school culture, how teachers' engagement in professional development influenced educational practices, and how these factors impacted student learning outcomes. Using a descriptive and correlational research design, the study gathered data through survey questionnaires that assessed school culture, teachers' interest in professional development, and student success. Descriptive statistics were used to determine the levels of these variables, while correlation and regression analyses examined their relationships and predictive influences. Findings indicated that school culture, professional development interest, and student success were consistently rated as "Very High." A strong positive correlation was found between professional development and school culture (r = .676), while a moderate positive correlation was observed between professional development and student success (r = .518). A very strong correlation (r = .803) was found between school culture and student success. Regression analysis confirmed that school culture and professional development significantly predicted student success. The study stressed the critical role of fostering a strong school culture and enhancing professional development opportunities to improve student learning outcomes. Based on the findings, an action plan was proposed to strengthen these areas, ensuring long-term educational effectiveness.