When you arrive in the classroom on Monday morning you discover all the numbers have fallen off the class number square and they are in a heap on the floor. All that is left on the wall is a blank grid!

There's five minutes to go before the lesson starts and you need the number square.

Can you find a quick way of putting the numbers back in their right places on the grid?

Where will you start?

Before you start think - does your class number square start with $0$ or $1$? Or a different number?

Some of your friends may want to have a go too.

What different ideas are there about how to put the number tiles back as quickly as possible?