BUNPHA, C.; SAENPLUEM, B. DEVELOPMENT OF MATHEMATICS LEARNING ACTIVITIES ON RATIO AND PERCENTAGE BASE ON PROBLEM-BASED LEARNING APPROACH SUPPLEMENTED WITH KWDL TECHNIQUE ON ACHIEVEMENT AND MATHEMATICAL PROBLEM SOLVING OF PRATHOMSUKSA 6 STUDENTS. Journal of Humanities, Social Sciences, and Arts, [S. l.], v. 8, n. 1, p. 112–123, 2026. Disponível em: https://so03.tci-thaijo.org/index.php/hsa/article/view/289035. Acesso em: 2 oct. 2026.