Prasongsuk, C. and Phuseerit, T. (2025) “Development of Learning Activity Using Group Investigation for Promote Collaborative Problem Solving Competency of Mathayomsuksa 4 Students”, Journal for Developing the Social and Community . Bangkok, Thailand, 12(2), pp. 339–358. available at: https://so03.tci-thaijo.org/index.php/rdirmu/article/view/290393 (accessed: 2 September 2026).