Farhan Firdaus. IMPROVING ACTIVITY AND KKM ACHIEVEMENT THROUGH PROBLEM BASED LEARNING MODELS ON SOCIAL PROBLEMS LEARNING MATERIALS AT CLASS XI SOCIAL 5, 1ST SEMESTER, SUKABUMI 4TH SENIOR HIGH SCHOOL ACADEMIC YEAR 2020/2021: UPAYA MENINGKATKAN KEAKTIFAN DAN PENCAPAIAN KKM MELALUI MODEL PEMBELAJARAN PROBLEM BASED LEARNING PADA MATERI PERMASALAHAN SOSIAL KELAS XI IPS 5 SEMESTER I SMA NEGERI 4 SUKABUMI TAHUN AJARAN 2020/2021. JS [Internet]. 2020Oct.25 [cited 2024May5];4(2):68-6. Available from: https://ejournal.unibabwi.ac.id/index.php/santhet/article/view/1051