Pilert C, Tunapan M, Chutiman N. DEVELOPMENT OF MATHEMATICS LEARNING ACTIVITIES ON SERIES FOR MATHAYOMSUKSA 6 BASED ON STUDENT TEAM ACHIEVEMENT DEVISION (STAD) COOPERATIVE WITH ELECTRONIC MEDIA. JMND [internet]. 2021 Mar. 31 [cited 2025 Dec. 5];8(3):367-80. available from: https://so03.tci-thaijo.org/index.php/JMND/article/view/251173