PEEKUNTOD, T.; HUNSUWAN, K.; WONGSAN, W. The Development of Mathematics Skills Practice Drills in Mathematics Learning Strand on the Topic of Addition and Subtraction Within 20 for Grade 1 Students Wat Rachsingkorn School. Journal of Education Rajabhat Maha Sarakham University, Maha Sarakham, Thailand, v. 21, n. 2, p. 157–164, 2024. Disponível em: https://so06.tci-thaijo.org/index.php/edu-rmu/article/view/273652. Acesso em: 13 apr. 2025.