This work aimed to investigate, during an action of education al development, the understanding of a group of teachers of the Chemistry teaching contextualization before, during and after discussions and reflections of different points of view of contextualization, and how they were reproduced in the planning of instructional materials. The investigation was developed by using opened questions, activities, video taped teachers' reports, analysis of documents and structured interviews. Four perspectives on the contextualization of teaching were prepared for the research. The results showed a broadening of the teachers'concep- tions, initially characterized as simple exemplifications and description of facts but later developing into well elaborated ideas of contextualization as the approach of social issues. However, the results pointed out that most of the elaborated didactic units did not reflect elements of these ideas broadening.
Contextualization; chemistry teaching; teacher's further education