Silalahi, Jernita Damayanti, Frans Lolo Osvaldo Tumanggor, and S Syahrial. “AN ANALYSIS OF STUDENTS’ LEARNING OUTCOMES AFTER THE IMPLEMENTATION OF PROBLEM BASED LEARNING (PBL) IN THE DEVELOPMENT OF MATHEMATICS WORKSHEETS IN ELEMENTARY SCHOOLS: A LITERATURE STUDY”. Jurnal Merah Putih Sekolah Dasar 1, no. 4 (March 31, 2024): 125–139. Accessed February 19, 2026. https://jurnal.unimed.ac.id/2012/index.php/jmpsd/article/view/58626.