Most of us associate modelling with the area of fashion and models
Yet, it aplies to almost any area ranging from economics to eduction.
Mellar and Bliss (1994) define modelling is thinking about one thing in terms of simpler artificial things. Mellar and Bliss (1994) also state that all modelling activities share the following three features:
- one thing used in place of another
- idealization and simplification of modelling resources
- a tendency to play with the modelling resources for their own sake
Despite the artificiality, simplicity and fully predetermined nature, models may lead to new and powerful insights (Mellar, Bliss, 1994). Although models fit more or less all we know about some aspects of reality they may also point to new things to look for, so they provide new thinking as much as they solve old problems (Mellar, Bliss, 1994). Mellar and Bliss (1994) summarize the major problems with modelling as follows:
- Modelling can be done more or less badly, so much so that it can become dangerous.
- The modelling of situations involving human choice raises various difficulties that don’t arise in modelling the behaviour of inanimate objects.
- Models once created may be used in dubious ways.
Various psychologists tried to explain what is happening when people are thinking. To exemplify, Piaget’s formulation of how we think describes what one uses to think with, the mental tools for thought which he called as operations or schemes. These include mental classification schemes that allow children to differentiate between living and non-living things, or between objects that will sink or float. The bottom line is that modelling is associated with cognitive development, so it should be more emphasized by educators and tried to be understood more in detail as it may provide great support for the cognitive development especially via use of online tools such as virtual worlds or simulations.

