This article presents the results of innovation, referred to as collegiate practice, in the practical training model of the elementary education major at Universidad de Concepción, Chile. The objective was to analyze the process of implementing the model, based on student perceptions and the model's influence in building pedagogical knowledge. The methodology, of a qualitative type, focused on case studies to permit holistic analysis of the conceptualizations; the content of 70 written reports was analyzed from a hermeneutical perspective. The results revealed a differentiation of the roles assumed by teachers during training, according to their pedagogical challenges and tasks. This innovation would mobilize the process of reflection through the participants' problematization as a response to the learning scenario.