Karawa, S. and Thinwiangthong, S. (2021) “The Students’ Problem Posing Process in classroom by Using Lesson Study and Open Approach”, Dhammathas Academic Journal, 21(4), pp. 81–92. available at: https://so06.tci-thaijo.org/index.php/dhammathas/article/view/250825 (accessed: 11 September 2026).