ria Irawati, Sri Wahyuni. Numbered Heads Together (Nht) Cooperative Learning Model on Students’ Mathematic Problem Solving Ability Study on Class ViII Students of Golden Star Informatics SMP. MREJ [Internet]. 2022 Oct. 31 [cited 2026 Jul. 21];6(2). Available from: https://journal.uir.ac.id/index.php/JPM/article/view/10145