Ayumni, F., Ulya, H. and Sumaji, S. (2025) “A Comparison of Student’s Mathematical Problem-Solving Ability between Realistic Mathematics Education Assisted by GeoSpace and Direct Instruction”, Kognitif: Jurnal Riset HOTS Pendidikan Matematika, 5(4). doi: 10.51574/kognitif.v5i4.3340.