Resumen

In a research project, developed during a master’s degree research in basic education teaching at Escola Superior de Educação of the Polytechnic Institute of Porto, a question relating the problem solving in children’s daily life to the development of financial education in basic education students raised. A suitable methodology was applied to the study, and 5th grade students were challenged to construct mathematical knowledge on the multiplication of non-negative rational numbers, through problem solving, and to activate concepts related to financial education. In this sense, a learning process was carried out, in which the problems created, the differentiated didactic-pedagogical materials used (such as origami, board games, interactive games) and videos were fundamental not only for promoting children's involvement in this project but also to stimulate the learning and the development of an interest for mathematics. Thus, this publication aims to share some of the results achieved and to reflect on the virtues and potentialities of research-action methodology project for the consolidation and strengthening of mathematical and financial contents in a perspective of education for citizenship.