Sokngam J, Thongdee V, Namsrithan S. Learning Management in Social Studies, Religion and Culture areas Based on Concentration to Promote Higher Secondary Students’ Learning Skill of Muaengkalasin School Kalasin Province. jomld [internet]. 2020 Feb. 25 [cited 2026 Oct. 15];5(1):180-98. available from: https://so06.tci-thaijo.org/index.php/jomld/article/view/240426