This activity was used by giving each pupil a set of the cards on the PDF document (ideally each set on a different colour). The graphs were printed on A3 paper and scattered around the room. The aim was for pupils to place each card on the correct graph (face down, so that pupils can't see other people&'s answers). At the end of the activity, the graphs can be taken in and you can assess how many correct answers are placed on it. It is worth remembering what colour set of cards were given to the weaker member of the groups to help assess their understanding.