SITUMORANG, H. . Improving Learning Outcomes in Mathematics Classes via Rewards and Punishments: an Action Research. Journal of Innovation and Research in Primary Education, [S. l.], v. 1, n. 1, p. 7–11, 2022. DOI: 10.56916/jirpe.v1i1.28. Disponível em: https://ejournal.papanda.org/index.php/jirpe/article/view/28. Acesso em: 21 jan. 2026.