Rahayu SM, Afisah. ENHANCING STUDENTS’ INTEREST IN LEARNING MATHEMATICS THROUGH THE IMPLEMENTATION OF PROBLEM-BASED LEARNING: A CLASSROOM ACTION RESEARCH. Perpendicular [Internet]. 2025 Mar. 31 [cited 2025 Aug. 2];1(1):31-9. Available from: https://jurnal.dokicti.org/index.php/perpendicular/article/view/939