What is changing the perspective on the model?
Changing perspective on the model means that the
learner is offered a number of different model progression levels
that present different ways of looking at the same system. For
example, in a model of a pendulum, one can define a 'position
view', emphasizing the dependence of the pendulum's position as a
function of time; or an 'energy view', taking the law of
conservation of energy as the main relation.