An Online Mathematics Learning Platform for Thai Student Based on a 5-levels Math Problem Difficulty Model. International Conference on Computers in Education, [S. l.], 2025. DOI: 10.58459/icce.2025.6091. Disponível em: https://library.apsce.net/index.php/ICCE/article/view/6091. Acesso em: 13 sep. 2026.