Pinagapho, Phrompiriya, Nattachai Juntachum, and Poosit Boontongtherng. 2020. “Development of Mathematics Learning Achievement on Preliminary Data Analysis For 11th Graders by Using CIPPA Learning Model”. Journal of Education Rajabhat Maha Sarakham University 17 (1). Bangkok, Thailand:83-95. https://so06.tci-thaijo.org/index.php/edu-rmu/article/view/251934.