OK so here is a lesson idea for you!! (Y9+ I’d guess)
Work out what the rules are that make this model work and create one that will appeal to a teenager (decide critera to ‘test’ this at this stage).
Test your model ‘purpose’ against the model given.
Ask your class mates to evaluate the model using the criteria given.
Extension – research other actions (eg loft insulation) and add them to your model – list sources and how you checked them.
Can you now think of better criteria to use for future evaluations?