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Aulya, M. and Manalu, K. 2025. THE EFFECT OF THE PROBLEM BASED LEARNING (PBL) LEARNING MODEL ON THE PROBLEM-SOLVING ABILITY OF THE HUMAN RESPIRATORY SYSTEM MATERIAL IN STUDENTS OF SMA NEGERI 1 BAHOROK: PENGARUH MODEL PEMBELAJARAN PROBLEM BASED LEARNING (PBL) TERHADAP KEMAMPUAN ‎PEMECAHAN MASALAH MATERI SISTEM PERNAPASAN MANUSIA PADA SISWA SMA NEGERI 1 ‎BAHOROK. SOSIOEDUKASI : JURNAL ILMIAH ILMU PENDIDIKAN DAN SOSIAL. 14, 3 (Aug. 2025), 1066–1074. DOI:https://doi.org/10.36526/sosioedukasi.v14i3.5933.