A choice in how you approach modelling

A traditional modelling approach

This approach imposes a high imaginative load. You are expecting children to link the abstract algebra with the phenomena, often mediated by another abstract representation: the scatter graph.

A more gradual approach to build up a model, by constructing interactive diagrams, physics interactive diagrams(PID). This approach may, by virtue of presenting a more gradual path to abstraction, and staying close to the physical situation for longer, provide a more fruitful route.

The PID approach

Comparing approaches

For here on in, we're going to suggest a gradualist approach, based on generating interactive diagrams.