Thephavongsa, Souphanh. “Enhancing the Teaching Skills of the Multi-Grade Teachers through Lesson Study”. International Journal of Learning, Teaching and Educational Research 17, no. 4 (April 30, 2018): 71–87. Accessed May 28, 2026. https://www.ijlter.myres.net/index.php/ijlter/article/view/684.