Sash writes: 'Get the children to draw up a 7 x 7 grid (good skills!) and number 1-49. They put numbers in any box, no set order - they must make sure their layout is different to other children. Tell them to put 1 somewhere, then 2, then 3 ...etc so they don't lose track of the numbers! The teacher they uses various operations to ask questions - children work out answer and shade in the box. Winner is the first to get a line. Less able can team up to build confidence - it goes quite quickly! When they have mastered this, change the numbers - I have used negative numbers, 50-98, multiples of 10, etc...it is quite easy to extend. It takes about 15 mins to do. I first saw this done in a Stanmore school by a shy teacher named Ian Tyler - cheers Ian!'