Thongmuang , Phitchayaphak, and Jakkrit Jantakoon. “The Development of Blended Learning Activities between Realistic Mathematics with Online Learning to Enhance Problem-Solving Ability and Mathematical Reasoning for Grade 5 Students”. Journal of Humanities and Social Sciences, Rajapruk University 9, no. 3 (December 31, 2023): 339–353. accessed April 22, 2025. https://so03.tci-thaijo.org/index.php/rpu/article/view/274263.