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thammawiwat nattapon, Sangaroon APDK, Thinwiangthong APDS. Students’ Creative Problem Solving in Mathematics Classroom Using Lesson Study and Open Approach. jma [Internet]. 2024 Apr. 25 [cited 2024 May 18];11(1):148-62. Available from: https://so04.tci-thaijo.org/index.php/JMA/article/view/265572