SOCHAIYAN, C.; Phattarachaleeku ม.; CHUTIMAN, N. Development of Mathematical Problem Solving Skills Using Problem-Based Learning with Digital Media on Ratio, Proportion and Percentage for Mathayomsuksa 1 Students. Journal of Education Rajabhat Maha Sarakham University, Maha Sarakham, Thailand, v. 19, n. 3, p. 201–214, 2022. Disponível em: https://so06.tci-thaijo.org/index.php/edu-rmu/article/view/261148. Acesso em: 1 oct. 2026.