Pannao N, Charoen-In U. THE DEVELOPMENT OF PROBLEM SOLVING ABILITY OF MATHAYOMSUKSA 5 STUDENTS BY USING METACOGNITION METHOD. JMND [internet]. 2020 Jun. 30 [cited 2026 Sep. 10];7(6):77-91. available from: https://so03.tci-thaijo.org/index.php/JMND/article/view/244524