Soparat, S., Roadrangka, V. and Tunhikorn, B. (2007) “Perception on Themselves and Their Students in Understanding Science Contents at Grade Level 2 of Grade 4-6 Teachers”, Kasetsart Journal of Social Sciences, 28(2), pp. 177–187. available at: https://so04.tci-thaijo.org/index.php/kjss/article/view/246436 (accessed: 13 September 2026).