The Implementation of Problem Based Learning to Improve Student Mathematics Learning Outcomes of First Grade Students State Senior High School 2 Bandar, Simalungun. RATE Issues, [S. l.], v. 24, n. 1, 2024. DOI: 10.69475/. Disponível em: https://rate.org.ro/index.php/ratei/article/view/43.. Acesso em: 1 oct. 2026.