UPONTEAN , S.; ONLAMUL, K. Problem-Based Learning Management for Developing Desirable Characteristics in Junior High School Students: A Mixed-Methods Research and Development Study in Maha Sarakham Province, Thailand. Insights into Modern Education (i-ME), [S. l.], v. 3, n. 1, p. 1–20, 2025. Disponível em: https://so19.tci-thaijo.org/index.php/IME/article/view/2274. Acesso em: 16 sep. 2026.