THE EFFECT OF PROBLEM-BASED LEARNING MODEL ON THE IMPROVEMENT OF STUDENTS’ CRITICAL THINKING AND LEARNING OUTCOMES IN SOCIAL SCIENCE LEARNING SUBJECT IN CLASS 5A OF SD KRISTEN 03 EBEN HAEZER SALATIGA . JPFKIP 2023, 12 (4), 945-956. https://doi.org/10.33578/jpfkip.v12i4.9785.