Until the proper D' Ambrsio, initially in its definitions restricts it the mathematics practised in the cultural contexts and developed in the direction to take care of the established constant necessities in day-by-day of these contexts. It is important to point out the pedagogical value of the Etnomatemtica for communities and existing contexts and its relationship with the practical daily pertaining to school, because this oportuniza an inquiry to know produced for definitive contexts and that they start to help in the agreement of the existing necessities in the nature of one determined group. 6 THE SOCIAL PAPER OF THE SCHOOL The scientific advance that characterized modernity brought as natural consequncias a change in the vision of world and a more objective and efficient form to face the cultural challenges taxes for the daily life. Educating today is confrotted with an infancy and, over all, a youth acquired knowledge and influenced for the great progressos of science and the technology and the perspective is that in the next years, a child of six or seven years of age arrives at the school having full ability of calculation. Ahead of this, a question fits: How the school answers to this world that if presents today with an enormous impact of social changes, politics, technological and economic? It is impossible to conceive a school whose bigger purpose is to give continuity to the past. Its bigger obligation is to prepare generations for the future, therefore the children who are today concluding the first phase of basic education will be the active forces of a well next future. The mission of the school and the educator is, therefore, to make possible and to speed up the transistion enter