CALPENTER, Jay-ar et al. Enhancing Problem-Solving Skills in Grade 7 Mathematics Using Manipulatives: A Classroom-Based Action Research. Kurukod Journal of Education and Social Science, [S. l.], v. 2, n. 2, 2025. DOI: 10.63798/kjess.2024.v2n2.0008. Disponível em: https://kjess.kurukodjournal.com/index.php/kjess/article/view/8.. Acesso em: 31 jul. 2025.