Have a go at this well-known challenge. Can you swap the frogs and toads in as few slides and jumps as possible?

This challenge extends the Plants investigation so now four or more children are involved.

Swap the stars with the moons, using only knights' moves (as on a chess board). What is the smallest number of moves possible?

This challenging activity involves finding different ways to distribute fifteen items among four sets, when the sets must include three, four, five and six items.

How could you put these three beads into bags? How many different ways can you do it? How could you record what you've done?

What happens when you round these three-digit numbers to the nearest 100?

Have a go at balancing this equation. Can you find different ways of doing it?

Can you work out some different ways to balance this equation?

Can you complete this calculation by filling in the missing numbers? In how many different ways can you do it?

How could you arrange at least two dice in a stack so that the total of the visible spots is 18?

Three children are going to buy some plants for their birthdays. They will plant them within circular paths. How could they do this?

This activity involves rounding four-digit numbers to the nearest thousand.

Explore Alex's number plumber. What questions would you like to ask? What do you think is happening to the numbers?

What happens when you round these numbers to the nearest whole number?

Use two dice to generate two numbers with one decimal place. What happens when you round these numbers to the nearest whole number?

Bernard Bagnall discusses the importance of valuing young children's mathematical representations in this article for teachers.

Here are some short problems for you to try. Talk to your friends about how you work them out.

This article, written for teachers, looks at the different kinds of recordings encountered in Primary Mathematics lessons and the importance of not jumping to conclusions!