WHATSAPP GROUP-BASED LEARNING ANALYSIS ON ACHIEVEMENT AND LEARNING DIFFICULTIES OF ELEMENTARY SCHOOL STUDENTS. Primary: Jurnal Pendidikan Guru Sekolah Dasar, [S. l.], v. 10, n. 1, p. 251 – 262, 2021. DOI: 10.33578/10.33578/jpfkip.v10i1.8048. Disponível em: https://primary.ejournal.unri.ac.id/index.php/JPFKIP/article/view/733. Acesso em: 17 dec. 2025.