MANALU, Erich Josia; SAINUDDIN, Syamsir; ARISHA, Bella. The Effectiveness of the NHT (Numbered Heads Together) Cooperative Learning Model in Improving Students’ Learning Outcomes on Algebra Material. OMEGA: Jurnal Keilmuan Pendidikan Matematika, [S. l.], v. 5, n. 2, p. 268–277, 2026. DOI: 10.47662/jkpm.v5i2.1294. Disponível em: https://ejurnal.univamedan.ac.id/index.php/jkpm/article/view/1294. Acesso em: 6 jun. 2026.