Sudsaneiha A, Wangkaeohiran T, Ankasem P. A Study of Academic Achievement Based on Mathematical Process by a Learning Activitiy Package According to the Active Learning Concept for Prathomsuksa 4 Students. J.Grad Res [Internet]. 2020 Dec. 1 [cited 2024 Apr. 24];11(2):123-36. Available from: https://so02.tci-thaijo.org/index.php/banditvijai/article/view/241132