M. . Martínez-Domínguez and D. C. . Peña-Infante, “Particularities of the teaching learning process in themultigrade group”, EduSol, vol. 19, no. 67, pp. 80–93, Apr. 2019, Accessed: Nov. 12, 2026. [Online]. Available: https://edusol.cug.co.cu:443/index.php/EduSol/article/view/704