(Hengsawang) PDK, Thongdee V, Namseethan S. The Development of a Learning Activity Package on the Analysis of Key Issues in Thai History Using Problem-Based Learning (PBL) for Matthayom Suksa 4 Students at Wat Sriwichai Wanaram School, Loei Province. jg-mcukk [internet]. 2026 Jun. 23 [cited 2026 Oct. 14];13(2):82-96. available from: https://so02.tci-thaijo.org/index.php/jg-mcukk/article/view/278728