Hutapea, Pinondang. 2025. “The Effect Of Group Investigation (GI) Learning Model Based On La-Boratory Experiment Skills On Newton’s La Material In Grade X Of Senior High School Negeri 2 Percut Sei Tuan Academic Year 2024/2025: Jurnal Pendidikan”. Jurnal Ilmu Pendidikan Dan Humaniora 14 (3):205-19. https://doi.org/10.35335/jiph.v14i3.214.