Inequality is a relevant issue related to politics, society, culture, economy or history. In this way. Critical thinking is considered an essential step to allow teachers to educate for a citizenship oriented to justice in a school understood as the engine of social change. Moreover, several studies have shown the effectiveness of debates and argumentation in social sciences classes in other to teach significantly. This is possible starting from conflicts and socio-environmental realities in order to construct a truly democratic citizenship. According this, it is presented one of the latest versions of the didactic experience design, “let’s buy!”, in addition to the evaluation and reflection of this experience based on the information collected by the teacher’s diary, peer assessment and interview sheets for classroom group with a sample of 317 third-year students of the Bachelor’s Degree in Primary School Education at the University of Huelva. In general, in coherence with the results of some relevant researches on citizenship education and initial training of teachers and taking as a reference the reflection on the action, it is concluded that didactic experiences where socio-economic problems of the daily environment of students are analyzed can contribute to awareness and professional predisposition of future teachers to consider situations that could affect the teaching and learning process.