Argumentação e prova na matemática do ensino médio: progressões aritméticas e o uso de tecnologia

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

In the first term of 2005, I joined the Professional Masters degree on Mathematics Teaching at PUC/SP. In this same year, the research project AProvaME, whose goals are: investigating concepts about argumentation and proofs of teenager students at schools from São Paulo state; structuring groups composed by teachers and researchers in order to elaborate activities involving students in the building process of knowledge, arguments and proofs in Mathematics, the use of technology and the investigating the teachers role as the mediator of this process. As a part of this project, I will structure my dissertation in order to investigate two situations. The first one to verify to what extent, by the teachers mediation and by the activities proposed, it is possible to engage students in argument, justification and proof of conjectures about Arithmetical Progressions. On the second one, investigating if the use of technology can favor the building of arguments, justification and proofs in Arithmetical Progressions by the students. Oriented by these questions, I tried to raise some observations of how the teachers mediation should be done, using activities related to Arithmetical Progressions to engage the students in argument, justifying and proof situations, as well as which type and how to use the technologies available: first of all, I realized the need for the teachers mediation after each ending of a group of activities, making a closure, or else, proposing to the students that they needed to confront and discuss, giving arguments, justifying their answers, so that everyone could proceed to the following activities without compromising their conjectures; subsequently; I verified that the use of technology is an incentive to the performing of activities in any area of knowledge, because the students feel motivated to build geometrical figures in the computer to solve the Mathematics exercises, concluding, with relation to the use of technology, I noticed that in the activities of this essay the usage of one more computational tool for the validation of students answers, as the Excel software, could complement the results obtained. This essay was based, mainly on the nine types of tasks extracted from Balacheff et al. text (2001). The methodology used was the teaching experiment, always looking for an improvement, not only in the activity, but also in the teacher-studenttechnology interaction. The research involved 10th graders from the evening shift of a State public network school

ASSUNTO(S)

educacao matematica matematica (ensino medio) technology in the teaching of mathematics elementary education educação básica argumentação e prova na matemática escolar tecnologia na educação matemática matematica -- estudo e ensino standards and progressions matematica padrões e progressões argumentation and proof in school mathematics

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