Mardiyah, Lutfiyati, and Anis Sunarsi. “Problem-Based Learning and Flipped Classroom: Can It Improve Student Achievement?”. Edumatica : Jurnal Pendidikan Matematika 14, no. 01 (April 30, 2024): 25-38. Accessed June 30, 2024. https://online-journal.unja.ac.id/edumatica/article/view/24948.