Nimnual, Chanasorn, Panutsorn Jaruchainiwat, and Suwimon Wongwanich. 2022. “Design and Development of School Readiness Enhancing Program of First Grade Students Using Design Based Research”. STOU Education Journal 15 (1):50-65. https://so05.tci-thaijo.org/index.php/edjour_stou/article/view/253919.