Mark a safe zone on both sides of the field about 40' from starting line. Designate an operation and roll 2 number cubes. If the answer is even, evens get safe and odds give chase and visa versa. If tagged player freezes and puts hand up. Count number of tagged players then all players return to starting lines to play again.
Players line up and hold hands.
The first 2 players turn to face teacher. The equation is shown to those 2 players. If the answer is odd the odd player squeezes the hand of the next player on the odd team. If the answer was indeed odd, that team earns a point. 1st players rotate to the end of the line and 2 new players see next equation.