This study investigates the mediating role of teacher self-efficacy in the relationship between instructional practices and organizational commitment among secondary school teachers in Davao del Norte, Philippines. Findings show that all three variables—instructional practices, organizational commitment, and sense of efficacy—are very high and significantly correlated, indicating that higher self-efficacy contributes positively to both instructional practices and organizational commitment. The research highlights the importance of effective leadership in enhancing teachers' commitment and work performance within educational settings.