This article describes a case study that is part of a broader research project in which schools set up processes of school improvement inspired by the proposals put forward by students. The project furthers the initiatives of the student voice movement and seeks to implement more participative pedagogical models. This as a whole represents a novel opportunity in the context of Spanish schools. Specifically, in the text we describe an experience in which students work as researchers (SAR) and in which we describe and discuss this process carried out in a primary school through ethnographic tools. The findings allow us to discover in this experience a learning opportunity for the members of the school community and for the school itself. Likewise, the research permits us to verify the existence of certain changes in the preexisting practice architectures that affect the cultural-discursive dimension, the material-economic dimension and the social--political dimension of schools.