The Principal’s Role as a Manager in Improving Learning Effectiveness. JISIP (Jurnal Ilmu Sosial dan Pendidikan), [S. l.], v. 10, n. 1, p. 173–178, 2026. DOI: 10.58258/jisip.v10i1.9785. Disponível em: https://ejournal.mandalanursa.org/index.php/JISIP/article/view/9785. Acesso em: 15 jun. 2026.