Adelina, Y.; Sembiring, M. G.; Rahman, A.; Syahril, S. THE EFFECTIVENESS OF THE PROBLEM BASED LEARNING AND SOCIAL SKILLS LEARNING MODEL ON THE CRITICAL THINKING ABILITY OF GRADE V STUDENTS OF SDN 101901 LUBUK PAKAM: Efektivitas Model Pembelajaran Problem Based Learning Dan Keterampilan Sosial Terhadap Kemampuan Berpikir Kritis Siswa Kelas V SDN 101901 Lubuk Pakam. SJIIPS 2025, 14, 355-372.