Juika, Juika, Sinta Verawati Dewi, and Yeni Heryani. 2026. “Effectiveness of Problem-Based Learning With the Teaching at the Right Level Approach on Students’ Mathematical Concepts Understanding Ability”. Kognitif: Jurnal Riset HOTS Pendidikan Matematika 6 (1):216-26. https://doi.org/10.51574/kognitif.v6i1.3379.