The study aimed to establish which individual work performance domain best influences adaptive behavior and organization-based self-esteem among 313 public school teachers of Kiblawan District, Division of Davao del Sur. A non-experimental quantitative research design using the descriptive-correlational technique was applied. Using modified questionnaires, the data collected were tested for reliability and validity by experts. In analyzing the data, mean, Pearson r, and regression analysis were used. Results revealed that the level of work performance was high organization-based self-esteem was very high and adaptive behavior was high. The relationship between Individual Work Performance and Organization-Based Self-Esteem was significant, indicating that higher levels of individual work performance are associated with higher levels of organization-based self-esteem. Similarly, there was a significant positive correlation between Adaptive Behavior and Organization-Based Self-Esteem. A linear regression analysis shows that both Task Performance and Contextual Performance significantly predict Organization-Based Self-Esteem. Additionally, Individual Work Performance significantly predicts Organization-Based Self-Esteem. The findings have significant implications for organizations seeking to improve employee morale and organizational performance through targeted interventions aimed at enhancing both work performance and adaptive behavior.<p> </p><p><strong> Article visualizations:</strong></p><p><img src="/-counters-/edu/0754/a.php" alt="Hit counter" /></p>