Hongwiset, Pitchaporn. “Problem-Based Learning Management Study with KWDL Technique Problems of Addition, Subtraction, Multiplication, Division of People of 4th Grade”. Academic MCU Buriram Journal 8, no. 2 (August 28, 2023): 65–76. accessed April 15, 2025. https://so06.tci-thaijo.org/index.php/ambj/article/view/264763.