Thís article focus attention in discussing sorne reasoníngs supported in research about the use of cornputers in the classroorn, and it also gíves sorne examples of the use of software in the rnathernatics class. The purpose of these examples is to rnake teachers thínk about their need to get involved in using and learníng new technologies, in additíon the possible structure of the kínds of problerns in the teacher's traíníng, and sorne írnplilcatíons in the currículum