Khamlue, Kanlayanee, and Wanida Pharanat. “The Development of Group Investigation Learning Activities for High School Students, Informal and Independent Education Center”. Interdisciplinary Academic and Research Journal 3, no. 6 (December 5, 2023): 797–814. accessed April 25, 2025. https://so03.tci-thaijo.org/index.php/IARJ/article/view/270915.