This is one of my casual favourite teaching resources. "Feral Animal Hunt" is a game that combines Numeracy knowledge & skills of addition, subtraction and grid referencing/coordinates, as well as the Environmental knowledge of Australian native and feral animals.
It is a simple as handing out a sheet to each student, and them plotting the required number of feral and native animals on the grid as they like. The teacher then calls out a series of grid reference points. When the teacher has called out the desired number of grid points, the students then add up (and subtract for any native animals) the total number of animals caught in traps. The student with the highest score wins!!!