Interações sociais em aulas de química: a conservação de alimentos como tema de estudos

Abstract

Besides the increasing interest on science class discursive practices, I consider that we still know a few about significance processes on chemistry classes. This study aimed to analyze, from a historic- cultural approach, the discursive interaction developed by me and my students during a series of Chemistry classes which took place in a state public secondary school located in the outskirts of Belém. My objective was to analyze the process of signification at Chemistry classes from a thematic approach of knowledge, in which I discussed the processes of food conservation as subject of study. For such, I conducted the analysis as a case study, of the performance of three students through their written answers at different times of the activity and their participation in the interactions occurred in the groups. The classes were videotaped and transcribed. I analyzed the discursive interactions microgenetically, trying to evidence the voices involved in the process of signification. The points of view present in the discussion consisted of : a) the voice of empirical observation of the phenomenon; b) the voice of the students previous daily experiences; c) the voice of the students previous school knowledge; d) the voice of the scientific discourse, introduced by me during the interactions. The considering or not of different points of view showed by the students has constituted limits and possibilities to the concept sense elaboration developed during the classes. These results call attention for the importance of teachers adoption of a dialogic interactive communicative approach, giving value to different perspectives explanation and confrontation.