EFFORTS TO IMPROVE THE COMPETENCE OF UPPER CLASS TEACHERS IN MAKING SUBJECT PROBLEMS THROUGH TEACHER’S GROUP WORK AT SDN 3 TABONGO GORONTALO. JournalNX [Internet]. 2023 Apr. 7 [cited 2026 Feb. 17];9(4):38-49. Available from: https://repo.journalnx.com/index.php/nx/article/view/4714