Eka Margareta Sinaga, Nova Florentina Ambarwati, and Ahmad Sudito Sihotang. 2026. “Ruma Bolon-Based IPAS Instruction for Strengthening Elementary students’ Critical Thinking Skills”. Primary: Jurnal Pendidikan Guru Sekolah Dasar 15 (3): 786-96. https://doi.org/10.33578/jpfkip.v15i3.786-796.