Química no Cabelo - O Ensino de Ligações Químicas com Apoio de Cartilha Educativa no Ensino Médio

Abstract

This work presents “Hair Chemistry” as a theme to be contextualized with content related to chemistry teaching, developing students' participation and motivation in classrooms, considering that difficulties in learning chemistry occur through the mechanization of abstraction of concepts and formulas, resulting in classes uninteresting for students. The proposed topic Chemistry in hair will help with the content Chemical bonds considering that hair structures have disulfide bonds, hydrogen and ionic bonds, and which undergo changes after chemical procedures. A proposal presented works on teaching chemistry through a transversal theme which is the health, which according to the National Curricular Parameters (PCN’s) is a topic that should be inserted in school curricula, as it contributes to citizenship training and field of knowledge. The chosen methodology uses the sequence inspired by the approach CTS, presented by Teixeira (2003) which follows five steps: 1) Social issue introduced; 2) A technology related to the topic is analyzed; 3) The scientific content is worked on; 4) Technology is studied depending on the content, and 5) Resumption of the social issue. From of the methodology used, the results were: Relating chemistry in hair with the Teaching of Chemical; Show the composition of the hair structure and its divisions, as well as the connections chemicals present in the hair; Inform about the risks of allergies and harmful damage to health due to excessive and inappropriate use of chemical hair products; And validate the use of educational booklet as a teaching resource in Chemistry Teaching. In this sense, the theme of Chemistry in hair proves to be efficient with regard to contextualization of content with issues relevant to society, once presented to the thematic through topics such as: hair structure, coloring, straightening and health risks, issues encountered in the daily lives of many students.