Hasibuan, Syarinah Junianti, Tari Rodearna Br Sipakkar, Tiara Helmira, Marlina Friska Nova Pardosi, and Anim Anim. 2024. “Implementation of Problem Based Learning (PBL) Model to Increase Students’ Interest in Learning Spatial Building Material in Class VII of SMP Negeri 5 Kisaran”. Holistic Science 4 (3):483-87. https://doi.org/10.56495/hs.v4i3.663.