To know something regarding certain object does not want to say, necessarily, to know something socially accepted as ' ' conhecimento' '. ' ' Saber' ' it wants to say to have constructed some conception that explains certain set of phenomena or objects of the reality. (P. 20) the evolution of the writing in the process of learning and acquisition of the alphabetical system, according to research of Emilia Blacksmith, call of Psicogentica Evolution, presents distinct phases: The first infantile writings, considered of traditional form, are scribbles, lines, small balls, but loaded of meanings, the construtivista point of view. In the graphical aspects, they can be only traces badly defined, but they follow a line of regular evolution. It is in this first period, that child obtains to perceive the difference between drawing and writing, giving an important step for the following stages of the understanding of the writing.
' ' The children do not use its efforts to invent new letters: they receive the form from the letters of the society and they adopt them such and qual.' ' (BLACKSMITH, 2010, P. 23) At as a moment, the child searchs to find solutions for the differentiation between the types and meanings of the writing. At some moments if apia in the use of different letters for different words, at other moments if apia in the amount of letters for different words. (at least three letters a word to have meant or power to be chore). This period demands of the child great cognitiva activity. ' ' In these two first periods, the writing is not regulated by differences or similarities between significant sonoros.' ' (BLACKSMITH, 2010, P. 27) the silbico period initiates when the child ' ' it starts for discovering that the parts of the writing (its letters) can correspond to others as many parts of the words written (its syllables) ' ' (BLACKSMITH, 2010, p.27).