The study examines how leadership practices mediate the relationship between organizational values and organizational citizenship behavior among public school teachers. The research used a quantitative design and gathered data from 400 public school teachers through a validated questionnaire. The results indicated a high level of organizational values, organizational citizenship behavior, and leadership practices among the participants. Significant relationships were found between organizational values and organizational citizenship behavior, organizational values and leadership practices, and leadership practices and organizational citizenship behavior. Regression analysis revealed that specific domains of organizational values (economic, professional, aesthetic, and physical) and leadership practices (modeling the way, inspiring a shared vision, challenging the process, and enabling others to act) significantly influenced organizational citizenship behavior. Path analysis also confirmed that leadership practices do not mediate the relationship between organizational values and citizenship behavior. This study underscores the importance of nurturing organizational values and effective leadership practices to enhance teachers organizational citizenship behavior, thus contributing to the overall effectiveness of educational institutions.