Donpudsa P, Khechornphak T. The Development Of Learning Achievement on Parallel Lines By Group Learning Activity With TAI Technique of Mathayomsuksa 2. edu-rmu [Internet]. 2022 May 12 [cited 2024 Apr. 26];19(1):131-40. Available from: https://so06.tci-thaijo.org/index.php/edu-rmu/article/view/256457