Given the egocentrismo on the part of the child the dialogue it is practically inexistent. Exactly when it plays in set with other children, it is verified that each one speaks for itself without if interesting with the answers of the others. To this intention, we must say of collective monlogo instead of colloquy or dialogue. The works of Piaget disclose with clarity that the representation of the world made for a child differs from the one of the adult. In the first years of the stadium daily pay-operatrio the child will not understand the conservation notion: two equal containers I contend volume of water the same are recognized for the child as having the same volume of water, if however if to lie down the liquid of one of the containers for a high and narrow test tube, the child, in this etria phase, will say that the test tube contains more water for the water level is higher, not yet understood that one objecto conserves its original properties (conservation notion). However the capacity to perceive the conservation in all the aspects did not happen simultaneously. For example, the number conservation or of volume it does not occur in the same age.
Period of training of the Concrete Operations – this stadium is drawn out approximately of the seven to the eleven years. At the beginning of the same, for return of seven years or eight, the equilibrao between the assimilation and the room become more steady. The end of this stadium marks the transistion of infancy for the puberty. During this stadium it appears the capacity of if effecting logical analyses, of – an increase of the empatia with the feelings and attitudes them others (ultraticket it egocentrismo) and is started to have understanding of more complex relations cause-effect. It is also in this stadium that if of the o jump in the development of the capacity of use of the symbolic thought. CONCLUSION the work of Piaget has widely influenced the practical one of the professor in the pertaining to school environment. To understand as it occurs the periods of training will be able to help the professor to understand and to develop its activities, adjusting to each period and each stage of the pupil.