HUAISAI, S.; DUANGNET, S.; SANPUNDORN, S. The Development of Academic Achievement on Geometry of Grade 3 Students at Nong Bua Nai School, Nam District, Kalasin Province using Learning Activities Based on the Concrete-Pictorial-Abstract (CPA) Approach. Academic Innovation Journal, [S. l.], v. 1, n. 3, p. 218–228, 2025. DOI: 10.14456/aij.2025.16. Disponível em: https://so11.tci-thaijo.org/index.php/aij/article/view/2586. Acesso em: 16 sep. 2026.