Andriyono, Andriyono, and HermanTatang. “Problematic Elementary School Teachers in The Process of Learning Mathematics Online During Covid-19 Pandemic”. International Conference on Elementary Education 3, no. 1 (April 12, 2021): 536-544. Accessed December 23, 2024. http://proceedings2.upi.edu/index.php/icee/article/view/1512.