GUSTIANY, Anisah. Learning activities and mathematical problem solving abilities using the connecting organizing reflecting extending (core) learning model For class VIII students of SMP Negeri 8 bukittinggi . Jurnal THEOREMS (The Original Research of Mathematics), [S. l.], v. 9, n. 1, p. 1–9, 2024. DOI: 10.31949/th.v9i1.7897. Disponível em: https://ejournal.unma.ac.id/index.php/th/article/view/7897. Acesso em: 6 jul. 2025.