Pasaribu, R.M.I. et al. 2024. IMPROVING MATHEMATICAL THINKING THROUGH THE IMPLEMENTATION OF THE PROBLEM-BASED LEARNING MODEL IN ELEMENTARY SCHOOL STUDENTS. Jurnal Merah Putih Sekolah Dasar. 2, 1 (Sep. 2024), 1–10. DOI:https://doi.org/10.24114/jmpsd.v2i1.60128.