RAJAGUKGUK, Waminton. DEVELOPING MATHEMATICAL PROBLEM SOLVING SKILLS WITH INTERACTIVE PROBLEM BASED LEARNING AND DISCOVERY LEARNING. JURNAL HANDAYANI PGSD FIP UNIMED, [S. l.], v. 11, n. 1, p. 29–41, 2020. DOI: 10.24114/jh.v11i1.18657. Disponível em: http://103.242.233.34/index.php/handayani/article/view/18657. Acesso em: 31 jan. 2025.