Current social contexts demand significant changes in the teaching approaches. Basic education seeks to develop skills that allow students to act and solve problems in their everyday life, putting practical and theoretical knowledge into practice. Because of its relevance for communication and learning, writing has become one of the priorities of the educative system. Therefore, the curricula establish that students, upon finishing primary school, should be able to produce texts that enable them to communicate effectively.This research analyzes the writing skills of 90 sixth graders in order to observe if their narratives achieve clear and accurate linguistic interaction. For this study, children’s narratives have been revised based on Cassany's (2011) review guide. This author proposes to analyze ten aspects in a text: focus, information, structure, paragraphs, phrases, words, punctuation, level of formality, rhetorical resources and presentation. These aspects will allow to assess student’s writing in comparison with the standards indicated in the graduation profile of Basic Education.