SARI, S. N.; KAMILA, R.; PAKPAHAN, S. R.; SIREGAR, F. W. IMPLEMENTATION OF PROFESSIONALISM BY MATHEMATICS TEACHERS IN MANAGING LEARNING AT UPT SMP NEGERI 35 MEDAN. Algebra : Jurnal Pendidikan, Sosial dan Sains, [S. l.], v. 5, n. 1, p. 41–45, 2025. DOI: 10.58432/algebra.v5i1.1326. Disponível em: https://ejournal.yana.or.id/index.php/algebra/article/view/1326. Acesso em: 17 sep. 2026.