Before the game starts both teams number themselves from 1 - 5 (or more dependant on number of players).
The team in possession must then pass the ball around in a numeric order whilst trying not to lose possession
The team in possession scores a point when all players on their team have had the ball once.
Meanwhile the other team tries to intercept the ball.
To being with players can only mark their opposite number but once players are a little more warmed up open up the game so that players are free to do what they want (as long as they continue to pass in numerical order).
"It is not only useful for staff who are experienced but a valuable tool for those subject staff who have to take teams."
The variety of sessions across sports - sometimes we steal session ideas from one sport and use them with another.
As we enter the business end of the competition, we take a look at the remaining eight teams and the key talking points surrounding each side.