In this talk we would like to present MoMAMath, an on-line interactive software for mathematics learning, based on Mathematica and WebMathematica. The software has been realized by the authors and it has been experimented to support classical courses of basic mathematics for first year engineering students at the University of Salerno. MoMAMath aims to improve to the didactic potentialities of the traditional textbook. In fact it is completely interactive and based on the learning by doing approach. MoMAMath’s distinctive feature is the possibility of on-line interactive exercise sessions, besides other classical services like theory sessions, asynchronous communication with teachers, and so on.