SariMia Zultrianti, and Camelia Camelia. 2020. “Effect of Active Learning Strategy Type Card Sort of Understanding The Concept of Students: (Quasi-Experimental Study in Elementary School Fourth Grade Cigedang on Scene 7 IPS Subtheme 1 Education Academic Year 2018/2019)”. International Conference on Elementary Education 2 (1). Bandung, Indonesia, 1460-79. http://proceedings.upi.edu/index.php/icee/article/view/774.