Bunprasanrit C, Ugsonkid S, Tangkawsakul S. THE STUDY OF HIGH SCHOOL STUDENTS’ MATHEMATICAL COMPETENCY ON INTEREST AND TIME VALUE OF MONEY BY TEACHING THROUGH PROBLEM SOLVING. JEI [internet]. 2024 Dec. 15 [cited 2026 Sep. 15];26(4):116-29. available from: https://so06.tci-thaijo.org/index.php/edujournal_nu/article/view/270585