AUMPA BORIBOON. DEVELOPMENT OF MATHEMATICS INSTRUCTIONAL PACKAGES USING PROBLEM BASED LEARNING (PBL) AND TEAM GAMES TOURNAMENT (TGT) TO ENHANCE MATHAYOM SUKSA 3 STUDENTS’ MATHEMATICS PROCESS SKILLS, ATTITUDE AND LEARNING ACHIEVEMENT. Educ. J. KPRU. [internet]. 2022 Sep. 23 [cited 2025 Apr. 15];3(5):107-31. available from: https://so08.tci-thaijo.org/index.php/EJFE/article/view/847