[1]
N. Doungphumek, K. Wiwanthamongkon, and N. Punkong, “The Development of Training Kits to Enhance Learning Outcomes and Mathematical Problem - Solving Skills According to the Vygotsky and Feuerstein Theoretical Frameworks for Mathayom Suksa 3 Students”, edjour_stou, vol. 19, no. 1, pp. 19–34, Jun. 2026.