Hi, my name is Shane Sachse.  I have been teaching in a P-12 school for the past 6 years.  Here is a game which I have played with both primary and secondary level.

Elimination Soccer Stations
equipment - 2-3 soccer balls, 20-30 cones.

The game can be played with as many students as you like.  I usually play with a group of 15-20.  Using one half of a basketball court (better if it is played indoors) place 12-15 pairs of cones around the court, spacing them at least 1/2 metre apart. Each person has 1 pair of cones to defend.  The aim of the game is to eliminate people out of the game by knocking one of the two cones over.  You can also be eliminated if you knock your own cone over with your feet.  I use 3-4 substitutes on the sidelines.  Once you have been eliminated you go to the end of the side line and the substitutes move up one space.  The first substitute replaces the person who was eliminated.  The person who goes in is not in the game until their cones are setup again. If a cone is struck but only slides along the floor, the person is not out, however they must leave the cone where it is and defend it as well.  I use two balls at one time to make sure people are regularly getting eliminated. Soccer rules apply and students are encouraged to move around the court instead of always standing still.

Modifications:  If people aren't getting eliminated, either add an extra ball or I throw in extra players who are called 'terminators'.  Their job is to eliminate people out of the game.