This paper contributes to the research strand concerning early algebra and focuses on a classroom episode realized within our ArAl project. The episode concerns the observation of a third grade class dealing with the problem of translating into arithmetical/algebraic code a process of calculation written in natural language. The problem is framed in the ‘matematóca game’, a game specifically conceived in order to bring the pupils to face the first experiences about the use of letters to represent natural numbers variable in a small set of cases and about the writing of easy algebraic sentences. Beside the good mathematical results, the episode highlights a significant role of the teacher and also the question of relational dynamics among the pupils.

Didactical Processes in Early Algebra: an example about the approach to brackets in third-grade classes / Malara, Nicolina Antonia. - STAMPA. - (2005), pp. 218-227. ((Intervento presentato al convegno SEMT '05 tenutosi a Praga nel 2005, August 22-26.

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