Wipha, Ratchaneekorn, and Wannatida Yonwilad. “Enhancing Fraction Problem-Solving Skills through the PISA-Based Design Thinking Process for Grade 5 Students”. Journal of Education, Language, and Cultural Studies 2, no. 1 (July 3, 2026): 39–50. accessed September 14, 2026. https://so17.tci-thaijo.org/index.php/JELCS/article/view/1867.