Punklan K, Boonsong S. PROBLEM- BASED LEARNING MANAGEMENT IN HISTORY COURSE TO DEVELOP ACADEMIC ACHIEVEMENT AND ANALYTICAL SKILLS FOR PRIMARY 5 (GRADE 5) STUDENTS. JSBA [internet]. 2020 Dec. 20 [cited 2026 Apr. 22];5(12):213-25. available from: https://so04.tci-thaijo.org/index.php/JSBA/article/view/247156