EFFORTS TO IMPROVE THE COMPETENCE OF UPPER CLASS TEACHERS IN MAKING SUBJECT PROBLEMS THROUGH TEACHER’S GROUP WORK AT SDN 3 TABONGO GORONTALO. JournalNX - A Multidisciplinary Peer Reviewed Journal, [S. l.], v. 9, n. 4, p. 38–49, 2023. DOI: 10.17605/OSF.IO/2SWJ3. Disponível em: https://repo.journalnx.com/index.php/nx/article/view/4714. Acesso em: 12 jul. 2025.