Fostering Transit between Real World and Mathematical World: Some Phases on the Modelling Cycle |
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Authors: | Carolina Guerrero-Ortiz Jaime Mena-Lorca Astrid Morales Soto |
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Institution: | 1.Instituto de Matemáticas,Pontificia Universidad Católica de Valparaíso,Valparaíso,Chile |
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Abstract: | This study shows how, in the initial training of mathematics teachers, it is possible to promote processes of abstraction and mathematisation through modelling a real situation with the support of auxiliary material to mediate understanding. By adapting elements of the theoretical and methodological framework called Abstraction in Context (AiC), participants’ discussions while building a mathematical model—in a nested epistemic actions—are analysed. Two specific points are discussed in this paper. The first aims to identify how different types of knowledge emerge when an individual is faced with a modelling task. The second is regarding the use of auxiliary material as a means of metaphorising a situation. It was evidenced how the material favours the construction of a mathematical model through the simplification and idealisation that it brings. The meaning constructed for the model is supported in recognising a decreasing behaviour as a part of a whole. |
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