Pimthong P, Soparat S, Chamrat S. The constructionist paradigm shift of teachers in 21th century learning. kasetsart J. Soc. Sci. [Internet]. 2017 Apr. 1 [cited 2024 Apr. 26];38(1):470-81. Available from: https://so04.tci-thaijo.org/index.php/kjss/article/view/242645