This dissertation, performed in a private school in the municipality of Rio de Janeiro, aims to study the interactions between subjects, both adults and children, in the classroom and at school. The interactions among themselves and with the knowledge were prioritized in the study, in order to know/understand, from practice, if spaces and collaboration routines are built or not. To this end, the research was qualitative, having, as its methodology, the observation (using field notes) in two classrooms and at the school, informal conversations with adults and interviews with the management, as well as analysis of school documents. The understandings and interactions biases, having collaboration as backdrop, showed and suggested analysis categories exploited in this work. The authors that were used as main reference were Mikhail Bakhtin, Lev Vigotski, childhood sociologists such as William Corsaro, and other childhood and interactions thinkers. In chapter one the idea is to present the proposed study object, in a dialogue with the researcher’s trajectory. This chapter discusses from the theoretical formulation of the issues till the field entry, as well as the research strategies. Chapter two presents the theoretical foundations that supports the research and the interlocution with the field and with the subjects, as well as the analysis that were being built. Chapter three proposes an approach with respect to interactions in school that were analyzed by the researcher as aspects that build a conception axis, of school objectives and practices. In the final considerations are taken up the established meanings for the interactions and collaboration, that make possible to think about the interactions in schools. The child s perspective as a historical and social subject, that produces culture at the same time that is inserted in it, brought the child to the center of the research and to the analyses.