Development of the IDCIR Mathematics Learning Model to Improve Junior High School Students’ Problem-Solving and Creative Thinking Skills. Riemann: Research of Mathematics and Mathematics Education, [S. l.], v. 7, n. 3, p. 204–217, 2025. DOI: 10.38114/riemann.v7i3.117. Disponível em: http://journal.sanagustin.ac.id/index.php/reimann/article/view/117.. Acesso em: 18 apr. 2026.