SUMARNI; MARSITIN, Retno; FERDIANI, Rosita Dwi. Problem-Solving Ability Through the Fast Feedback Method with a Student Answer Grouping Model. Journal of Education and Learning Mathematics Research (JELMaR), [S. l.], v. 6, n. 2, p. 143–151, 2025. DOI: 10.37303/jelmar.v6i2.3845. Disponível em: https://jelmar.wisnuwardhana.ac.id/index.php/jelmar/article/view/5. Acesso em: 4 jun. 2026.