Bridging the mediational gap with dynamic geometry: dynamism, dependence and temporality
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The emergence of Dynamic Geometry Environments -such as GeoGebra- has brought about changes in both the teaching and learning of geometry, as well as in Geometry Education research. The aim of this article is to interpret such changes as a reduction of the mediational gap.To develop this objective, two important aspects are presented. On the one hand, the historical evolution of geometric representations -from static to dynamic representations-, the technologies that generate them and the level of interaction they allow. And on the other hand, the characterization of the mediational role of Dynamic Geometry Environments, through the description of their dimensions, namely, dynamism, dependence and temporality. Together, both aspects allow us to recognize that the reduction of the mediational gap produced by Dynamic Geometry Environments refers to the possibility of accessing and interacting with the structure of geometric objects. This thanks to the geometric properties added to the dynamic representations, the possibility of unveiling the hierarchical relationship between the constituent objects of a dynamic representation, and conjecturing or making visible the sequence of construction of a dynamic representation.
To develop this objective, two important aspects are presented. On the one hand, the historical evolution of geometric representations -from static to dynamic representations-, the technologies that generate them and the level of interaction they allow. And on the other hand, the characterization of the mediational role of Dynamic Geometry Environments, through the description of their dimensions, namely, dynamism, dependence and temporality.
Together, both aspects allow us to recognize that the reduction of the mediational gap produced by Dynamic Geometry Environments refers to the possibility of accessing and interacting with the structure of geometric objects. This thanks to the geometric properties added to the dynamic representations, the possibility of unveiling the hierarchical relationship between the constituent objects of a dynamic representation, and conjecturing or making visible the sequence of construction of a dynamic representation.
- Mediation
- Dynamic Geometry Environments (DGE)
- Representation
- Dragging
- GeoGebra
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