HermawatiEli, PebriyantiIndri, and Yani Fitriyani. 2021. “The Effect of Application of The Auditory Intellectually Repetition (AIR) Cooperative Learning Model to Improve the Understanding of Mathematics Concepts”. International Conference on Elementary Education 3 (1). Bandung, Indonesia, 145-52. http://proceedings.upi.edu/index.php/icee/article/view/1456.