SALVE, Mariam M. Principal’s Supervisory Roles: Impact on Teacher’s Teaching Effectiveness and Students’ Academic Performance in Secondary Schools of Sulu. International Journal of Research in Engineering, Science and Management, [S. l.], v. 5, n. 11, p. 25–27, 2022. Disponível em: https://journal.ijresm.com/index.php/ijresm/article/view/2419.. Acesso em: 3 jul. 2024.