An interactive whiteboard game to practise number properties. Thirty particles fall from above. Use the repelling particle to nudge them into the correct box depending on whether they contain a square number or a prime number. No points are scored if they miss both boxes. A point is deducted for the wrong box and a point is added for the correct box. Once all thirty particles have fallen the game is over. See who can get the highest score. Class involvement can be increased by allowing the audience to call out numbers and their property.
Quick thinking and a careful hand are required for this one!
Comments, suggestions, problems below please.