Donpudsa, Piyanut, and Thanyaluck Khechornphak. “The Development Of Learning Achievement on Parallel Lines By Group Learning Activity With TAI Technique of Mathayomsuksa 2”. Journal of Education Rajabhat Maha Sarakham University 19, no. 1 (May 12, 2022): 131–140. Accessed April 27, 2024. https://so06.tci-thaijo.org/index.php/edu-rmu/article/view/256457.