Kyozaikenkyu: essential lesson planning in japanese lesson study

Resumen

Lesson Study is a teacher training process practiced by Japanese educators in a cycle subdivided into stages. Although all stages are relevant, the first one concentrates the complexity of the process that is little known by non-Japanese educators - called kyozaikenkyu. This stage aims to promote more knowledge about some mathematical content and its teaching practice. The qualitative and interpretative research was about how eleven Brazilian teachers appropriated a kyozaikenkyu on the concept of fraction for students of the sixth year of regular Brazilian Elementary Education, during twelve consecutive weeks, promoted and supported by the authors of this article, who acted as participating observers in terms of research. The result revealed the teachers apprehension of new knowledge about fractions, especially from the measurement perspective, in addition to learning how to conduct the practice of this teaching, paying attention to social aspects during classes and recognizing the role of resources and didactic-pedagogical materials.