Enfoque CTS para o ensino do conceito de soluções: uma abordagem temática com plantas medicinais

The literature shows that in the area of Chemistry Teaching the concept of solutions is pointed out as difficult to be worked in the classroom, especially in high school classes. This research aimed to contribute to this discussion, seeking new possibilities to approach the concept in the classroom, from the Science, Technology and Society (CTS) approach. The general objective was to teach the concept of solutions, seeking scientific and technological literacy. In order to reach this goal, an initial diagnosis was made with the participants and, later, a didactic sequence (educational product with orientations to teachers) was elaborated, applied and evaluated with students of basic education. Seven meetings were held at the Atheneu Norte-Riograndense School with the support of the teacher in charge and participation of the 38 students in the class. The material was conceived from the first diagnostic questionnaire, adopting a thematic approach on medicinal plants. It was planned as a sequence of activities that aimed to promote discussions about CTS relations, the knowledge of tradition and scientific knowledge, as a way of contextualizing the teaching of the concept of solutions. This qualitative research had as instruments for data collection two questionnaires: one of diagnostic evaluation and the second of evaluation of the didactic sequence. One of the activities of greatest pedagogical relevance was the simulated jury. From the results obtained, it was possible to attest that, although the theme of medicinal plants is not commonly treated in the classroom, it is present in the culture of the students, in their community and of their ancestors. The results also showed that the activities proposed in the didactic sequence made it possible to teach in a contextualized way the concept of solutions. ; A literatura mostra que na área de Ensino de Química o conceito de soluções é apontado como difícil de ser trabalhado em sala de aula, muito particularmente em turmas de Ensino Médio. Esta pesquisa visou ...