Somwong, Thanida, and Parichart Prasertsang. 2021. “The Development of Problems Solving Skills of Grade 6 Students by Learning Management With K-W-D-L Techniques”. Journal of Roi Et Rajabhat University 15 (1):160-73. https://so03.tci-thaijo.org/index.php/reru/article/view/237203.