Sipahutar, C.E. and Mukhtar 2023. Application of the Game Based Learning Model to Improve Students’ Concept Understanding Ability at SMP Negeri 35 Medan. Formosa Journal of Science and Technology . 2, 2 (Feb. 2023), 569–578. DOI:https://doi.org/10.55927/fjst.v2i2.2713.