This descriptive-correlational study investigated the relationship between school heads’ mentoring practices, supervisory skills, and teacher performance in Iloilo City, Philippines. Data from 350 randomly selected elementary and secondary teachers revealed that school heads prioritize fostering a positive attitude in teachers, while their overall supervisory skills are perceived as exceeding expectations. Interestingly, teacher performance also exceeded expectations, but no significant correlation was found between mentoring-supervisory skills and teacher performance. This suggests that other factors beyond school leadership might influence teacher effectiveness. However, mentoring practices were consistently valued by teachers, highlighting their importance in creating a supportive school environment.