Immune system Assign two or more chaser students who are identified with coloured sashes or objects to hold. They are the virus and they have to run around touching as many students as possible. Touched students have to freeze in place. A frozen (infected) student can be freed if two healthy molecules join hands around the frozen one. Game continues until all students are infected, or you've had enough.

Play Simon Says, except incorporate big physical movements and stretches like running around the room, jogging on the spot and licking your elbow.

Students move around the room however they like, but must form into clusters of a given number when that number is announced.

Set out a running track with markers, or an existing one if you're lucky enough to have one. Students are put into groups of four and they have to run anticlockwise around the track in aline. When you blow the whistle, the student at the back of each line must go to the front, without the whole group stopping. When you blow the whistle twice quickly, the train changes direction and goes backwards.

Students stand in a personal spot with enough room to stretch out. You stand at the front and model an exercise while they stand still. They start doing thatmovement after you have changed to a differentmovement, then have to change to that one when you change again, and so on, always staying one exercise behind you.

Students are in groups of two, who must hold hands at all times. Assign a few of thesepartners to be 'taggers'. The taggers run around trying to tag other groups. When a group is tagged, they must stand still until another group comes along and holds hands with them, forming a longer chain. The catch is, once they have freed another group, they become stuck to them and must then operate as a single group. There is no limit to the size of a group; kieep playing until the group comprises of everybody or there are no unfrozen teams left.

Students walk around on all fours, facing upwards. These are the "spiders". Two students are selected as "scorpions", who walk on all fours facing down. The scorpions have to try to tag the spiders. When a spider is tagged, they must raise one limb into the air and stop moving, staying in that 3-point balance for the remainder of the game.

Each child gets a marker and puts it down in their own personal space. On your command, students must (walk/bounce/stride/run/hop) away from their marker and around the room, until your signal to return to their marker.