Rahayu, Sri Mulya, and Afisah. 2025. “ENHANCING STUDENTS’ INTEREST IN LEARNING MATHEMATICS THROUGH THE IMPLEMENTATION OF PROBLEM-BASED LEARNING: A CLASSROOM ACTION RESEARCH”. Perpendicular : Journal of Mathematics Education and Learning 1 (1): 31-39. https://doi.org/10.61994/perpendicular.v1i1.939.