MENINGKATKAN MOTIVASI BELAJAR SISWA MELALUI MODEL PEMBELAJARAN PROBLEM BASED LEARNING PADA MATA PELAJARAN IPS DI KELAS IX SMP ADVENT TONDANO. Literacy: Jurnal Pendidikan Ekonomi, [S. l.], v. 4, n. 1s, p. 74 83, 2025. DOI: 10.53682/jpeunima.v4i1s.8154. Disponível em: https://ejurnal.unima.ac.id/index.php/jpe-unima/article/view/8154. Acesso em: 9 may. 2026.