Abstract
The text revisits the work Psychogenesis of Written Language (1999), by E. Ferreiro and A. Teberosky, in order to clarify the processes that involve the acquisition of reading and writing and, especially the diagnostic evaluation practice, which consists in actions promoted by Literacy teachers in the early years of Cycle I at school. Therefore, research related to their work and the relevance of these survey practices in a school environment, in the literacy cycle, were academicaly ascertained. The text's contributions aim to recognize the state of the work in academic research during the latest decades, as well as highlight points that show the importance of the diagnostic evaluation practice.