FAJAR HAMZAH. IMPROVING MATHEMATICS LEARNING OUTCOMES THROUGH THE IMPLEMENTATION OF PROBLEM-BASED LEARNING APPROACH IN ELEMENTARY SCHOOL PEKANBARU. Mathematics Research and Education Journal, [S. l.], v. 8, n. 1, p. 42–52, 2024. DOI: 10.25299/mrej.2024.vol8(1).16831. Disponível em: https://journal.uir.ac.id/index.php/JPM/article/view/16831. Acesso em: 21 jul. 2026.