Ramadhina, A. and Tambunan, E.P.S. 2025. THE EFFECT OF THE PROBLEM BASED LEARNING (PBL) MODEL ASSISTED BY FLIPBOOK MEDIA ON THE CRITICAL THINKING SKILLS OF STUDENTS IN PRIVATE HIGH SCHOOL PAB 8 SAENTIS CLASS XI ON THE MATERIAL OF THE HUMAN DIGESTIVE SYSTEM: PENGARUH MODEL PROBLEM BASED LEARNING (PBL) BERBANTU MEDIA FLIPBOOK TERHADAP KEMAMPUAN BERPIKIR KRITIS SISWA DI SMA SWASTA PAB 8 SAENTIS KELAS XI PADA MATERI SISTEM PENCERNAAN MANUSIA. SOSIOEDUKASI : JURNAL ILMIAH ILMU PENDIDIKAN DAN SOSIAL. 14, 3 (Aug. 2025), 1245–1255. DOI:https://doi.org/10.36526/sosioedukasi.v14i3.5983.