A química envolvida na descoloração do cabelo: uma abordagem contextualizada para o ensino de química

Abstract

Learning difficulties still constitute a challenging theme, especially for teachers of the nature sciences. In the context of chemistry teaching, traditional and decontextualized pedagogical practices are still persistent, which contributes to the demotivation of students. The general objective of this work was to analyze the causes and the chemical processes that break the hair, during the decolaration and to discuss means of prevention based on the chemical knowledge, through the perception of the students about the importance of the activities With regard to the processes of oxirreduction. The methodology consisted of an explanatory and experimental research with a qualitative focus. Data collection took place in the month of March 2019. The subjects of this study were 47 students of the elementary and middle School of Santa Luzia in the municipality of Fortaleza-CE. The work was developed in three moments, planning of classes, preparation of the didactic material used in the theoretical and practical classes, data collection, which took place through a questionnaire, before and after the class, and data processing, which took place by analysis Thematic. When the students were approached about the understanding of the relationship of the subject of oxirreduction with the hair issue, 78.2% of the students responded that they could understand and 19.1% showed no comprehension, as they responded in a confusing way and, 2.7% They said they couldn't make the relationship. The result of this research confirmed that with a practical class, involving a situation of the daily lives of these students, was able to improve the understanding of the knowledge acquired in the classroom in the discipline of chemistry.