As concepções dos alunos do ensino médio sobre o conteúdo de ligações químicas: uma análise nos livros didáticos através da prática educacional do SESI/PR

Abstract

The present research aimed to investigate the alternative concepts of High School students who use as reference for his/her studies books of the 2016’s NPDB (National Plan for Chemistry workbooks) approaching the theme of ‘chemical bounding’ through a workshop educational practice and group work. The results of this evaluation guided the tabulation of data, which were faced with a test applied after teaching and learning using textbooks. The intervention was conducted in four high school classes that presented interserial students and the same level of knowledge. Each class received a current book from NPDB 2016 during the Bimaster, for studies on chemical bonds. It was found that the students presented confusion between ionic and covalent bonding, stability of the substances in the formation of the octet, difficulties in the three-dimensional visualization of molecules, observation about the events of the microscopic observable level and difficulties in the representation of the chemical bonds. It was also concluded that students have difficulties identifying the ions formed by the atoms when the ionic connection happens. By the results obtained, it was noted that in the four books of the NPDB applied in the teaching and learning of this chemical content, students obtained significant learning results, but all the classes presented alternate concepts after the studies conducted through the books. Finally, with the realization of this work, a didactic sequence was made available, presenting lessons, defining a procedurechained steps to make the pupils ' learning process more efficient and intend to contribute to the reflection and work of teachers in chemistry teaching.