Simatupang, J. , Sihombing, L.N. and Lumbantobing, M.T. 2026. The Effect of Project-Based Learning Models on Science Learning Outcomes of Fifth Grade Students. Jurnal Ilmu Sosial dan Humaniora . 4, 1 (Jan. 2026), 359–368. DOI:https://doi.org/10.58540/isihumor.v4i1.1493.