Sirait, Khorint Meilani, Emelda Thesalonika, and Desi Sijabat. 2025. “The Effect of Project Based Learning (PJBL) Model Based on Marharoan Bolon in Science Subjects on Students’ Learning Outcomes in Grade V UPTD SD Negeri 122379 Pematangsiantar”. MSJ : Majority Science Journal 3 (2):8-17. https://doi.org/10.61942/msj.v3i2.326.