. E, Fauzi A. IMPROVING THE UNDERSTANDING OF THE CONCEPT AND STUDENT LEARNING ACTIVITIES USED COOPERATIVE LEARNING MODEL TYPE STAD BASED STRUCTURED LKS. JPF Unimed [Internet]. 2013 Jun. 1 [cited 2025 Jul. 3];2(1):43-50. Available from: https://jurnal.unimed.ac.id/2012/index.php/jpf/article/view/4336