THE IMPACT OF PBL WITH PEER TUTORS ON THE PROBLEM SOLVING ABILITY OF MIDDLE SCHOOL STUDENTS. Jurnal Pendidikan dan Kebudayaan Missio, [S. l.], v. 14, n. 2, p. 190–203, 2022. DOI: 10.36928/jpkm.v14i2.830. Disponível em: https://jurnal.unikastpaulus.ac.id/index.php/jpkm/article/view/830. Acesso em: 28 aug. 2026.