INCREASING STUDENTS’ ENGAGEMENT AND ACADEMIC ACHIEVEMENT THROUGH THE INTEGRATION OF PROBLEM-BASED LEARNING AND DIFFERENTIATED INSTRUCTION MODELS AT SMA NEGERI 6 KABUPATEN LAMPUNG TIMUR. (2025). JETA (Journal of English Teaching and Applied Linguistic), 6(1), 1-9. https://jurnal.stkippgribl.ac.id/index.php/jeta/article/view/1923