秦丹; 范悦悦. “双减”政策背景下小学数学分层作业存在的问题及优化策略. 中国现代教育学报 , [S. l.], v. 2, n. 1, p. 37–41, 2026. DOI: 10.70693/jyxb.v2i1.209. Disponível em: https://wisvora.org/index.php/jyxb/article/view/209. Acesso em: 29 jan. 2026.