This article gives account of the results of an action research project that focused on how students develop decision-making processes in the creation of collaborative work plans by using their portfolios in English classes.The study was carried out in a Colombian public school located in a deprived area, and involved eighth grade students with low English competence.Data were collected through students' portfolios, interviews, field notes, and surveys.The results suggest that students can develop their autonomy if they are involved in collaborative decision-making practices and if awareness-raising processes take place.