Uma proposta de sequência didática para contextualizar o ensino de química com o tema alimentos

Abstract

This work results from a proposal of Didactic Sequence to contextualize the teaching of organic chemistry with Food theme, giving emphasis to the macromolecules Carbohydrates, Lipids and Proteins. The work was applied at the School of secondary education José Gomes Filho, with a group of 3rd year of polytechnic high school. For the development of the proposal, ten classroom hours were used, divided into three stages. In the first, the initial problematization occurred, where a questionnaire was applied and a text on the subject was discussed. The second stage was the organization of knowledge, where the students studied each of the macromolecules with their functions, examples and also a review of the organic functions present in them, and after the study of each one, experiments were carried out on the respective nutrient. The last step was the application of knowledge, where an experimental class was made and the students identified the macromolecules present in the food samples through specific reagents and applied an evaluation on all the content and work developed. After the application of the didactic sequence, it was concluded that the proposal provoked in the students a greater interest in the classes, that participated in the learning process counting their experiences and their perceptions, had a conceptual evolution and a greater knowledge about the theme worked.