Klein, Sándor, Julianna Kiss, Zsolt Nemeskéri, and Iván Zádori. “Student-Centered School, Competency Development and Playful, Experiential Mathematics Learning in Hungary”. Acta Cultura et Paedagogicae 3, no. 1 (May 21, 2024): 75–86. Accessed June 12, 2026. https://journals.lib.pte.hu.testing.qulto.eu/index.php/acep/article/view/7535.