patta, supapornpatta, Chaowprapha Chueasathuchon, and Chuanchai Chueasathuchon. “Some Variables Related to Mathematics Problem-Solving Ability of the Sixth Grade Students in the Schools under the Office of Amnatcharoen Primary Educational Service Area”. Ubon Ratchathani Journal of Research and Evaluation 8, no. 2 (December 31, 2019): 145–156. Accessed May 5, 2024. https://so06.tci-thaijo.org/index.php/ubonreseva/article/view/197267.