Kongburan, Patcharin, Piyatida Panya, and Anusorn Janpratak. “THE RESULTS OF USING THE LEARNING ACTIVITY PLAN BY USING A 5-STEP LADDER-STYLE LEARNING ACTIVITY, THE VOCATIONAL COURSEWORK 1 OF MATHAYOMSUKSA 1 STUDENTS”. Journal of Education and Innovation 26, no. 1 (January 27, 2024): 255–265. Accessed May 10, 2024. https://so06.tci-thaijo.org/index.php/edujournal_nu/article/view/262761.