Resumo

SILVA ALAYON, Darwin Jesús. De lo real a lo formal en matemática. Rev. de Inv. Educ. [online]. 2010, vol.3, n.2, pp.157-178. ISSN 1997-4043.

The present article is just a part of a wider qualitative investigation, which have used the critic action-research method and have pretended, most of all, to develop a first approach to the educational projects related to the different energy sources valuation problem, designed to allow the students of the third grade of Medium Education² the acquisition of mathematical knowledge. These are some remarkable conclusions of this investigation: 1) beginning from the different energy sources valuation problem, we got to develop the "function" concept; and 2) the students use mathematical concepts, procedures and representations, in order to understand the established situation, but also they use the analyzed issue in order to understand mathematical concepts.

Palavras-chave : mathematical teaching; study of crisis situations and natural events; action-research.

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