Sokngam, J., Thongdee, V., & Namsrithan, S. (2020). Learning Management in Social Studies, Religion and Culture areas Based on Concentration to Promote Higher Secondary Students’ Learning Skill of Muaengkalasin School Kalasin Province. Journal of Modern Learning Development, 5(1), 180–198. retrieved from https://so06.tci-thaijo.org/index.php/jomld/article/view/240426