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

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.

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.

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?

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

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

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

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

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

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

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

This article gives you a few ideas for understanding the Got It! game and how you might find a winning strategy.

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

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

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

Practise your number bonds whilst improving your memory in this matching pairs 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?

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

Can you complete this jigsaw of the multiplication square?

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

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?

These interactive dominoes can be dragged around the screen.

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....?

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?

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

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

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

Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a square.

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

Seeing Squares game for an adult and child. Can you come up with a way of always winning this game?

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?

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

Choose the size of your pegboard and the shapes you can make. Can you work out the strategies needed to block your opponent?

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

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

Investigate which numbers make these lights come on. What is the smallest number you can find that lights up all the lights?

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.

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?

Board Block game for two. Can you stop your partner from being able to make a shape on the board?

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

What is the greatest number of squares you can make by overlapping three squares?