Written resolution of a mathematical problem by 11th grade students

[Excerpt] Problem solving and written communication are strongly connected, since the resolution of a problem presupposes the use of written communication to record the reasoning, either to communicate with another person or to review the resolution in the future. Bearing in mind this relation, and also considering the relevance of both in learning mathematics, our research question is: how students communicate their resolutions of a mathematical problem in writing? To answer this, we made a qualitative research with an interpretative paradigm. The participants were 29 students of 11th grade, divided into six working groups, who voluntarily signed up for a problem-solving project developed online and in an extracurricular format