http://www.cnr.it/ontology/cnr/individuo/prodotto/ID97542

Role of an artefact of dynamic algebra in the conceptualisation of the algebraic equality (Contributo in atti di convegno)

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Role of an artefact of dynamic algebra in the conceptualisation of the algebraic equality (Contributo in atti di convegno) (literal)

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Chiappini GP., Robotti E., Trgalova J. (2010)
Role of an artefact of dynamic algebra in the conceptualisation of the algebraic equality
in CERME 6, Torino, Italia
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Proceedings of the Sixth Congress of the European Society for Research in Mathematics Education (literal)

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ITD - Istituto per le Tecnologie Didattiche; National Institute for Pedagogical Research, Lyon and LIG, Grenoble (France) (literal)

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Role of an artefact of dynamic algebra in the conceptualisation of the algebraic equality (literal)

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Abstract

In this contribution, we explore the impact of Alnuset, an artefact of dynamic algebra, on the conceptualisation of the notion of algebraic equality. Many research works report about obstacles to conceptualise this notion due to interference of the previous arithmetic knowledge. New meanings need to be assigned to the equal sign and to letters used in algebraic expressions. Starting from the hypothesis that Alnuset can be effectively used to mediate the conceptual development necessary to master the algebraic equality notion, two experiments have been designed and implemented, one in Italy, the other in France. They are reported in the second part of the present paper. (literal)

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