syamsinar. “The Effect of the Numbered Heads Together Cooperative Learning Model on Students’ Mathematical Problem-Solving Ability at SMAN 1 Wondama”. International Journal of Technology and Education Research 4, no. 02 (May 2, 2026): 276-285. Accessed November 4, 2026. https://e-journal.citakonsultindo.or.id/index.php/IJETER/article/view/3190.