Supharoek, T., Wonglao, P., & Piromjitpong, S. (2020). Development of Active Learning with accountability Model to Enhance Mathematical Problem Solving Skills of 9th Graders. Journal of Education Rajabhat Maha Sarakham University, 17(1), 393–404. Retrieved from https://so06.tci-thaijo.org/index.php/edu-rmu/article/view/252194