O ensino de estequiometria a partir dos pressupostos da teoria histórico-cultural

Abstract

The present work contemplates the investigations about an intervention made through a teaching proposal, which approached the contents related to stoichiometry. The objective of this study was to understand about the teaching and learning of these contents, from students of a 2nd grade high school class, of a public school in the city of Bagé, Rio Grande do Sul. The research done and the classes had reference in the assumptions of Vygotsky. Thus, interpersonal relations were valued during didactic activities, and concepts such as mediation and Zone of Proximal Development, gained prominence. As far as stoichiometry is concerned, it is perceived that this is mentioned by different authors as a content difficult to understand by students. However, it is considered as an important knowledge of Chemistry, directly linked to the performance of science in society. Classroom activities featured a variety of resources, such as experiments and a board game. The analysis of the intervention was performed through Discursive Textual Analysis. Among the main results we highlight the improvement of student motivation, engagement and participation. We believe that there was an improvement in teaching and learning, through interactivity between the students themselves and the students and the teacher.