Ardana, D. A., Mawarsari, V. D., & Sulistyaningsih, D. (2026). Systematic literature review: Integrating problem-based learning with teaching at the right level to enhance problem solving skills. Jurnal THEOREMS (The Original Research of Mathematics), 11(1), 1–15. https://doi.org/10.31949/th.v11i1.16985