O uso do geogebra na aprendizagem de proporcionalidade

Abstract

This research investigates how Geogebra software can contribute to the interpretation and resolution of proportionality problems in a high school class of the Federal Institute of Alagoas - IFAL in the Satuba campus. It was investigated the strategies used to solve the problems of proportionality without the use of Geogebra software and later with the help of Geogebra. The general objective of the research was to investigate the contributions of the use of Geogebra to the learning of proportionality; The specific objectives were to analyze the students' previous knowledge about the concepts of proportionality; To verify if the students make use of the registers of semiotic representations in the resolution of the problems of proportionality; To verify if the software Geogebra facilitates in the understanding of the diverse representations existing in the problems of proportionality. The theory of the registers of semiotic representations of Duval (2003) and the Meaningful Learning of Ausubel from the studies of Moreira (2006) were used as theoretical foundation. It was characterized as a case study in a qualitative approach. Data were collected through questionnaires and recordings of video recordings during class. The subjects were 14 students of the technical course in Agroindustry of IFAL - Satuba. As a result, it was verified that: the subjects presented difficulties in the resolution strategies regarding the treatment and even more in the conversions (conceptual for graph for example) according to Duval's theory; Presented problems in the interpretation /resolution / representation of the problems of inverse proportionality (conceptual and graphical); However, with the use of Geogebra, they presented advances in understanding the problems of proportionality (graphical and tabular representation). As an educational product, we created a blog whose link is http://professorhugoleao.blogspot.com.br/ where we found interactive activities created in Geogebra and also the workshop realized during the research. We suggest that teachers and students access the blog and leave suggestions for future work and even creating new activities.