Math Duel - Test children's quick calculations under pressure!
I have used this app with children from Year 1 - Year 6, even with teachers on training INSET, all of whom respond in the same way - concentrating to try to win. You just need one iPad between 2 people (there is an option for one player, but the two player option is the best part of the app for me.) The screen is then split in half and each child sits at either end. Then it is a race in time to try and answer the question the quickest and make their bar in the middle bigger. The winner is the person with a full bar in the middle of the screen.