This article summarizes the results of analysis of the preschool classroom as a space for knowledge construction in San Pedro Claver educational institution in the municipality of Puerto Boyacá. From questions about the classroom as a physical space and objects that flow into it, is to make a critical analysis, from Popper's theory, in order to understand the classroom, meeting place andtraining processes their relationship with the objects and structuresready for teaching. Within this scheme is made use of the ethnographic method for obtaining categories, which resulted in theclassification of spaces and objects according to their use and meaning as a result which led to the concept of children's classroom as a setting for the promotion of social, expression of emotions and knowledge building.