INCREASING STUDENTS’ ENGAGEMENT AND ACADEMIC ACHIEVEMENT THROUGH THE INTEGRATION OF PROBLEM-BASED LEARNING AND DIFFERENTIATED INSTRUCTION MODELS AT SMA NEGERI 6 KABUPATEN LAMPUNG TIMUR. jeta. 2025;6(1):1-9. Accessed April 30, 2026. https://jurnal.stkippgribl.ac.id/index.php/jeta/article/view/1923