KUIVALAINEN, Mikko. Opetin.fi is a good addition to teacher’s toolbox. LUMAT: International Journal on Math, Science and Technology Education, [S. l.], v. 1, n. 4, p. 351–354, 2013. DOI: 10.31129/lumat.v1i4.1092. Disponível em: https://journals.helsinki.fi/lumat/article/view/1092. Acesso em: 22 nov. 2024.