NICCHIOTTI, Bianca; SPAGNOLO, Camilla. Perceived difficulty of mathematical tasks: The view of primary school teachers. LUMAT-B: International Journal on Math, Science and Technology Education, [S. l.], v. 10, n. 3, p. 7, 2025. Disponível em: https://journals-21.hulib.helsinki.fi/lumatb/article/view/2871. Acesso em: 14 oct. 2025.