SARTIKA, Rika Kamelia; NATALLIASARI, Ike; HERMANTO, Redi. Effect of the Teaching at the Right Level Approach on Students’ Mathematical Problem-Solving Ability. Kognitif: Jurnal Riset HOTS Pendidikan Matematika, [S. l.], v. 6, n. 3, p. 1242–1255, 2026. DOI: 10.51574/kognitif.v6i3.5299. Disponível em: https://www.etdci.org/journal/kognitif/article/view/5299. Acesso em: 25 sep. 2026.