SITINJAK, Rosinta Meissi; SIMANJUNTAK, Erlinawaty. THE IMPLEMENTATION OF PROBLEM BASED LEARNING MODEL TO INCREASE STUDENTS™ MATHEMATICAL PROBLEM SOLVING FOR GRADE VIII AT SMP NEGERI 37 MEDAN 2019/2020. JURNAL HANDAYANI PGSD FIP UNIMED, [S. l.], v. 10, n. 2, p. 90–98, 2019. DOI: 10.24114/jh.v10i2.16054. Disponível em: http://103.242.233.34/index.php/handayani/article/view/16054. Acesso em: 31 jan. 2025.