ANALYSIS OF AN INVESTIGATIVE TEACHING SEQUENCE ABOUT STOICHIOMETRY RELATED TO THE CHEMISTRY OF SOAPS AND DETERGENTS

• Autor(a) principal: Teixeira da Silva, Aline Aparecida
• Data de Publicação: 2020
• Outros Autores: Catão, Vinícius, Fátima Andrade da Silva, Aparecida de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Prática Docente
• Texto Completo: https://periodicos.cfs.ifmt.edu.br/periodicos/index.php/rpd/article/view/459
• topic: Cálculos Estequiométricos; Transformações Químicas; Contextualização; Stoichiometric Studies; Chemical Transformations; Contextualization

This paper describes and analyzes an Investigative Teaching Sequence (ITS) that approached the Chemistry of soaps and detergents. The ITS was designed to teach Stoichiometry in a contextual way to a class from the 2nd Grade of High School (15-16 years old) of a High School in the Viçosa’s town (Brazil), being discussed over eight classes of fifty minutes. To proceed the data analysis, eight Case Studies were prepared with description of the classes, based on the audios’ transcripts, students' answers and field notes. This analysis allowed conclude that the Stoichiometry discussed in the classroom through experimental investigative activities and with contextual approaches favored debates on socio-scientific issues. Its form of teaching approach allowed problematize the discussion, providing students with a more dynamic and participative interaction on the classes. This instructional process was led the students to a better understanding of the chemical content, as well as critical citizen formation.