UMAMI, Moh Rizal; YULIA; JUNIAWAN, Egi Adha. THE EFFECT OF THE PROBLEM BASED LEARNING MODEL ON THE ABILITY TO UNDERSTAND MATHEMATICAL CONCEPTS AMONG JUNIOR HIGH SCHOOL STUDENTS. Jurnal THEOREMS (The Original Research of Mathematics), [S. l.], v. 9, n. 2, p. 222–232, 2025. Disponível em: https://ejournal.unma.ac.id/index.php/th/article/view/12129. Acesso em: 26 apr. 2025.