Mardiyah, L. and Sunarsi, A. 2024. Problem-Based Learning and Flipped Classroom: Can it Improve Student Achievement?. Edumatica : Jurnal Pendidikan Matematika. 14, 1 (Apr. 2024), 25-38. DOI:https://doi.org/10.22437/edumatica.v14i01.24948.