Explorando o conceito de homotetia com alunos do ensino fundamental: uma abordagem com aplicativos dinâmicos inspirada na cultura visual

Abstract

Information and Communication Technologies are changing the scenario of several knowledge areas, particularly Mathematics Education. Working geometric concepts with computer resources became more dynamic and challenging. It is important that new activity proposals are developed and put into practice with the aim of stimulating the view of geometric properties and characteristics by students from the initial series. Given the viewing difficulties of the students of the classes where the researcher was regent, it emerged the idea of stimulating activities with resources that promote the viewing of characteristics and properties of the pictures and represented objects. In this research we developed a proposal for addressing dilation with dynamic applications articulated with the elements of visual culture. The dilation was chosen because it is the basis for the construction of concepts such as graphic scales and conical projections developed in the 9th year of elementary school and high school. The intervention research used the dilation as a guiding content and it happened during the school year of 2013, initially with students (11-13 years old) of the 6th year of elementary school at CAp-UERJ. The students were also observed during the 7th year. Data were collected through the researcher's field journal, audio and video recordings and responses of the proposed activities. The analysis was restricted to the mediating artifacts and the interaction as a learning potentiator. The proposition proved fruitful concerned to understanding of the students about the elements and characteristics, as well as the shape and size of the transformed picture, proportionally enlarged or reduced compared to the original picture. The research highlights the importance of exploring multimodality, favored by the visual culture of dilation approach. It also points out the potentiation of the interaction of students in the developed activities, for example, with the use of Blogs and other sites and more intense use of applications as part of the activities.