Báez, Ana Mercedes, Heidy Gómez, and Arnaldo Espindola Artola. “Didactic Model for Developing Variational Thinking in the Second Cycle of Primary Education”. Transformación 22 (June 30, 2026). Accessed August 17, 2026. https://transformacion.reduc.edu.cu/index.php/transformacion/article/view/626.