Hermiyanti. IMPLEMENTATION OF THE PROBLEM-BASED LEARNING METHOD TO IMPROVE THE UNDERSTANDING OF GRADE X GPI STUDENTS AT SMK NEGERI 4 MEULABOH ON MORALS IN ISLAM. jppg [Internet]. 2025 Feb. 2 [cited 2025 Aug. 3];3(1):6-11. Available from: https://journal.ar-raniry.ac.id/ppg/article/view/7447