An environment which simulates working with Cuisenaire rods.

How many trains can you make which are the same length as Matt's and Katie's, using rods that are identical?

Use the Cuisenaire rods environment to investigate ratio. Can you find pairs of rods in the ratio 3:2?

A train building game for two players. Can you be the one to complete the train?

Here are some rods that are different colours. How could I make a yellow rod using white and red rods?

Calculate the fractional amounts of money to match pairs of cards with the same value.

Is it possible to place 2 counters on the 3 by 3 grid so that there is an even number of counters in every row and every column? How about if you have 3 counters or 4 counters or....?

A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.

Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.

In this activity, the computer chooses a times table and shifts it. Can you work out the table and the shift each time?

Train game for an adult and child. Who will be the first to make the train?

A game in which players take it in turns to choose a number. Can you block your opponent?

Place six toy ladybirds into the box so that there are two ladybirds in every column and every row.

A game for 2 players that can be played online. Players take it in turns to select a word from the 9 words given. The aim is to select all the occurrences of the same letter.

This problem is based on a code using two different prime numbers less than 10. You'll need to multiply them together and shift the alphabet forwards by the result. Can you decipher the code?

Ahmed has some wooden planks to use for three sides of a rabbit run against the shed. What quadrilaterals would he be able to make with the planks of different lengths?

Use the interactivity to help get a feel for this problem and to find out all the possible ways the balls could land.

Cut four triangles from a square as shown in the picture. How many different shapes can you make by fitting the four triangles back together?

There are nine teddies in Teddy Town - three red, three blue and three yellow. There are also nine houses, three of each colour. Can you put them on the map of Teddy Town according to the rules?

Place the numbers 1 to 6 in the circles so that each number is the difference between the two numbers just below it.

Place the numbers 1 to 10 in the circles so that each number is the difference between the two numbers just below it.

Here is a chance to play a version of the classic Countdown Game.

This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?

Each light in this interactivity turns on according to a rule. What happens when you enter different numbers? Can you find the smallest number that lights up all four lights?

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

The 2012 primary advent calendar features twenty-four of our posters, one for each day in the run-up to Christmas.

Stop the Clock game for an adult and child. How can you make sure you always win this game?

Can you put the 25 coloured tiles into the 5 x 5 square so that no column, no row and no diagonal line have tiles of the same colour in them?

A game for two people that can be played with pencils and paper. Combine your knowledge of coordinates with some strategic thinking.

Use the interactivities to fill in these Carroll diagrams. How do you know where to place the numbers?

This is a game for two players. Can you find out how to be the first to get to 12 o'clock?

Can you match pairs of fractions, decimals and percentages, and beat your previous scores?

Can you complete this jigsaw of the multiplication square?

Use your mouse to move the red and green parts of this disc. Can you make images which show the turnings described?

Watch this film carefully. Can you find a general rule for explaining when the dot will be this same distance from the horizontal axis?

What do the numbers shaded in blue on this hundred square have in common? What do you notice about the pink numbers? How about the shaded numbers in the other squares?

Practise your tables skills and try to beat your previous best score in this interactive game.

Play this well-known game against the computer where each player is equally likely to choose scissors, paper or rock. Why not try the variations too?

Can you find a reliable strategy for choosing coordinates that will locate the treasure in the minimum number of guesses?

Practise your number bonds whilst improving your memory in this matching pairs game.

Add or subtract the two numbers on the spinners and try to complete a row of three. Are there some numbers that are good to aim for?

Can you put the numbers 1 to 8 into the circles so that the four calculations are correct?

First Connect Three game for an adult and child. Use the dice numbers and either addition or subtraction to get three numbers in a straight line.