Suwannasri S, Sangngam K. Development of Scientific Problem-Solving Ability through Problem-Based Learning Combined with Higher-Order Questioning Techniques among Grade 5 Students. edurmu [internet]. 2026 Aug. 30 [cited 2026 Sep. 13];23(2):385-96. available from: https://so06.tci-thaijo.org/index.php/edu-rmu/article/view/292815