MUSTHOFA, Musa. Application of STAD (student team-achievement divisions) Model to Increase Problem-Solving Activities for Quadratic Equation Material Class IX SMP Negeri 13 Malang. JOELI: Journal of Educational and Learning Innovation, [S. l.], v. 1, n. 2, p. 126–136, 2024. DOI: 10.72204/wjxgj486. Disponível em: https://journal.zamronedu.co.id/index.php/joeli/article/view/45.. Acesso em: 23 nov. 2025.