Chummongkol, P., Tupsai , J. and Yuenyong, C. (2025) “THE EFFECT OF ELEMENTARY SCHOOL SIZE ON CONSTRUCTIVISM IN THAILAND”, Journal of Research and Innovation for Sustainability (JRIS). Bangkok, Thailand, 2(1), pp. 58–79. available at: https://so17.tci-thaijo.org/index.php/JRIS/article/view/591 (accessed: 22 September 2026).