Compreensão do conceito de DNA por meio de uma Sequência de Ensino Investigativa (SEI) nos Anos Finais do Ensino Fundamental

Abstract

This study aimed to understand the concept of ADN, through the execution of an Investigative Teaching Sequence (ITS) on the extraction of this molecule in different fruits with students in the 9th grade of Elementary School at a Municipal Public School in Toritama - Pernambuco. The ITS was organized into three stages: 1 (exposition of content and problem question), 2 (execution of the activity) and 3 (evaluation). 30 students participated and were organized into six teams of five people. Each team received a type of fruit (plantain, kiwi, papaya, strawberry, grape and burro banana) and a script with instructions. The results revealed that it is possible to extract ADN molecules from different fruits, using accessible materials, even in the absence of a Science Laboratory. Despite this, it was also evident that, through this process, it is not possible to macroscopically visualize ADN. Furthermore, the execution of the three stages of the ITS was constructive, as the students interacted actively, in handling the materials, as well as in solving the directed study and in preparing the report. Therefore, the use of research-based teaching has proven to be efficient in helping students develop scientific thinking, as well as in understanding the concept of this molecule.