%0 Journal Article %A Botana, F. %A Abánades, Miguel Á. %A Escribano Martínez, Jesús %T Using a free open source software to teach mathematics %D 2012 %@ 1061-3773 %U https://hdl.handle.net/20.500.14352/44508 %X We present the experience of the authors teaching mathematics to freshmen engineering students with the help of the open source computer algebra system Sage. We describe some teaching resources and present an ad hoc distribution of Sage used by the authors. %~