Uma abordagem contextualizada para o ensino de nomenclatura de compostos orgânicos através da temática chás no ensino médio.

Abstract

The main forms of nomenclature of organic compounds covered in high school are: systematic nomenclature, functional class and trivial. Thus, a substance may have various official names, but only one formula. However, this content is regarded by many students as a hard subject and monotonous, because of the range of rules, definitions and classifications. An alternative of making most interesting and dynamic classes is to insert an approach that has a connection with the daily lives of students. Thinking about it, the tea theme could be used as a teaching method of organic nomenclature due to the high consumption of tea at least once a day because of its taste, smell and therapeutic purposes. This study reports the results achieved in a public school of Fortaleza and proposes to use the tea theme to contribute to the learning of nomenclature of organic compounds of the 3rd year high school students. For the development of activities planned was elaborated a cycle of five expository and interactive classes and two questionnaires: one to verity the previous conceptions of the students on the topic and the final questionnaire in order to analyze the acquired knowledge. In this work the students also identified the teas through color, smell, flavor and appearance of the plant. The results showed that 20% of the students agreed with the relationship between organic nomenclature and the tea theme and 47% did not know what organic substances are on about. The tea more mentioned was “boldo” (36%). The students thought that this theme could help them to learn nomenclature easier. The class of tea identifications was dynamic and funny, with the students sharing experiences about their knowledge. The theme teas showed to be an important tool for teaching organic chemistry, especially organic nomenclature and is also realized the value of their livings and everyday knowledge acquired.