Yimchoy, Ketsarin, and Wacharapatr Techawattanasiridumrong. 2022. “Guidelines for the Development of Child-Centered Teaching and Learning According to the Basic Educational Standards of Secondary Schools in Ang Thong Province”. Mahachula Academic Journal 9 (2). Bangkok, Thailand:50-63. https://so04.tci-thaijo.org/index.php/JMA/article/view/255249.