Sipahutar CE, Mukhtar. Application of the Game Based Learning Model to Improve Students’ Concept Understanding Ability at SMP Negeri 35 Medan. FJST [Internet]. 2023 Feb. 27 [cited 2024 Sep. 22];2(2):569-78. Available from: https://journal.formosapublisher.org/index.php/fjst/article/view/2713