Areerattanawet, Nattakan, and Wanintorn Poonpaiboonpipat. 2021. “LEARNING ACTIVITIES BASED ON 5 PRACTICES TO ENHANCE MATHEMATICAL REPRESENTATION ON FUNCTION FOR GRADE 10 STUDENTS”. Journal of Industrial Education 20 (2):45-56. https://ph01.tci-thaijo.org/index.php/JIE/article/view/244399.