Radioatividade : situação - problema com enfoque CTS no contexto do PIBID

Abstract

The study of radioactivity enables many classroom discussions for showing a great range of concepts and applications, beyond events and accidents which involve isotopes of radioactive chemical elements. This final paper describes a didactic sequence for teaching of radioactive with a STS focus, having as a theme of discussion about the situation-problem the exchange of hospital equipment, such as radiotherapy devices used for the diagnostics and treatment of diseases, emphasizing the disposal of radioactive waste. As a general objective, it was intended to understand what is shown about the investigated phenomenon, the radioactivity for undergraduate students participating in PIBID which are in Chemistry and Physics courses from Federal University of Pampa. The research methodology refers to a qualitative approach, which started by theoretical study from a bibliographic search followed by the application of a didactic sequence. The activities were realized in five remote meetings with a group of Chemistry and Physics students from PIBID. These made it possible to collect information from questionnaires, recordings and by the student’s participation during the meetings activities. There were analyzed with some principles of textual discourse analysis. The results show that the students were able to articulate the scientific knowledge studied at the meetings, bringing elements into the discussion to argue their proposals in solving the problem situation. Note the expansion of the meanings of the role of science and technology in society and the engagement of groups to seek other aspects besides those explored in the meetings. Noting that, the emerging categories resulting from the analysis showed the relevance and need to understand more about the radioactive thematic approach, the scientific and technological aspects involved, the understanding of the use of radiation and equipment responsibly and the neglect with society. The relevance of this type of approach for any level of education and, fundamentally, in the training of teachers, developing through debates the commitment of students to situations of reality problems, making them participate actively in the decisions related to society.