Nukuea C, Kongpao WW. Effects of contextual teaching and learning-based instruction with digital learning tools on writing competency of upper secondary students. kasetsart J. Soc. Sci. [internet]. 2026 Sep. 8 [cited 2026 Sep. 17];47(3):470312. available from: https://so04.tci-thaijo.org/index.php/kjss/article/view/292608