Nanci H. Lumbanraja, Lisbet Novianti Sihombing, and Canni Loren Sianturi. “The Influence of The Problem Based Learning Model on Learning Outcomes of Class V Students in Science Learning at UPTD SDN 125543 Pematang Siantar T.A 2023/2024”. International Journal of Integrated Science and Technology 1, no. 4 (October 31, 2023): 547–554. Accessed June 2, 2026. https://journal.multitechpublisher.com/index.php/ijist/article/view/675.