TRANSFORMATIONAL AND TRANSACTIONAL LEADERSHIP STYLES OF SCHOOL HEADS AND THEIR RELATIONSHIP WITH TEACHERS’ PERCEPTIONS OF SCHOOL EFFECTIVENESS IN LIANGA DISTRICT, SURIGAO DEL SUR DIVISION: A DESCRIPTIVE-CORRELATIONAL STUDY. Journal for the Advancement of Sustainable Development Goals, [S. l.], v. 1, n. 4, 2026. Disponível em: https://jasdg.com/index.php/jasdg/article/view/162. Acesso em: 14 nov. 2026.