Enacted teaching practices are invisible and mysterious. Critical reflective teachers are the ultimate goal of any teacher training. The goal of this research is to investigate whether teaching documentation work can be considered an instrument for fostering reflection, and to reveal pedagogical scenes (Margolinas and Rivière, 2005) and the contents used for planning and teaching. The study was carried out in the city of Rio de Janeiro - Brazil. We visited 80 public middle schools in all 11 educational districts, we talked to about 200 teachers, conducted 78 surveys based on an intentionally selected sample, and conducted one focus group and 12 semi-structured interviews. We used grounded theory and results were analyzed in light of the fundamental concepts in our theoretical framework such as reflection, documentation work, and ICT in education. Our results indicated an interaction between teachers and available resources (focus on technical, digital resources) to organize, create, extend, transform, remix, and share content, suggesting teachers reflective attitude during documentation genesis. We specifically investigated pedagogical documentation work and what it entails: motivations, purpose and use. The (oral, concrete, and visual) materials observed indicated that teachers motivation was more instrumental and pragmatic, with few transformative intents; moreover, there was little evidence of proactive, deliberate and intentional reflection such as retrospection on the practices just realized. Nevertheless, their attitudes and opinions suggested their genuine interest in improving their practices, and they believe that this can be stimulated through digital tools, recognizing documentation as a powerful one. Our discussion points to the limitations of our theoretical framework in explaining teachers documental genesis and its relation to reflective attitude. We acknowledge the need for a theory that recognizes and explains material agency (in our case, of digital technology), such as the Material Engagement Theory (MET).