Giuliana Dettori, Simonetta Greco, Enrica Lemut. Complementing different software environments to mediate the introduction of variable, parameter and unknown. In David Tinsley, David C. Johnson, editors, Information and Communications Technologies in School Mathematics, IFIP TC3/WG3.1 Working Conference on Secondary School Mathematics in the World of Communication Technology: Learning, Teching, and the Curriculum, 26-31 October 1997, Grenoble, France. Volume 119 of IFIP Conference Proceedings, pages 229-232, Chapman & Hall, 1997.
Abstract is missing.