RAMLAH, Noviyanti. PENINGKATAN AKTIVITAS BELAJAR SISWA DALAM PEMBELAJARAN MATEMATIKA MENGGUNAKAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING. Global Journal Teaching Professional, [S. l.], v. 2, n. 4, p. 564–576, 2023. DOI: 10.35458/jtp.v2i4.1182. Disponível em: https://jurnal.sainsglobal.com/index.php/gpp/article/view/1182. Acesso em: 9 may. 2026.