Panichsuay, Wichai, and Sumon Waiboonya. “The Lessons of Training Mathematical Processing Skills for Elementary Students’ Competencies”. Journal of Education Studies 49, no. 1 (March 30, 2021): EDUCU4901017 (16 pages) doi: 10.14456/educu.2021.17. Accessed May 3, 2024. https://so02.tci-thaijo.org/index.php/EDUCU/article/view/248205.