This book is the result of the research project that led to the final work of the Master's Degree in Education at the National University of Quilmes. This work begins with the observation of the walls of the classrooms of five schools in the east of the province of Mendoza (Argentina) that have the particularity that in the same building, at different times of the day, they share different levels of schooling: primary and secondary. Usually in most of the schools we visited we can observe that their walls display posters, writings, sheets, images, graffiti. Many of these visual productions function as curricular anchoring devices and are witnesses to daily classroom events. Other productions express more the subjectivity of the protagonists of these materials, the children and adolescents who express part of their identity in these writings. The aim of this work was to enter into this complex problematic context on the basis of the question of the meaning of everything we observeon the walls. In order to do so, we had to generate a theoretical, methodological and analytical framework that would allow us to access these messages and discourses.