The computer has made a rectangle and will tell you the number of spots it uses in total. Can you find out where the rectangle is?
An environment that enables you to investigate tessellations of regular polygons
Choose the size of your pegboard and the shapes you can make. Can you work out the strategies needed to block your opponent?
What shape is the overlap when you slide one of these shapes half way across another? Can you picture it in your head? Use the interactivity to check your visualisation.
Choose 13 spots on the grid. Can you work out the scoring system? What is the maximum possible score?
What shaped overlaps can you make with two circles which are the same size? What shapes are 'left over'? What shapes can you make when the circles are different sizes?
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?
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?
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 find all the different right-angled triangles you can make by just moving one corner of the starting triangle.
The 2012 primary advent calendar features twenty-four of our posters, one for each day in the run-up to Christmas.
Try to stop your opponent from being able to split the piles of counters into unequal numbers. Can you find a strategy?
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.
Imagine a wheel with different markings painted on it at regular intervals. Can you predict the colour of the 18th mark? The 100th mark?
Three beads are threaded on a circular wire and are coloured either red or blue. Can you find all four different combinations?
Can you match the halves in this interactive game?
An interactive game to be played on your own or with friends. Imagine you are having a party. Each person takes it in turns to stand behind the chair where they will get the most chocolate.
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.
Here are some rods that are different colours. How could I make a yellow rod using white and red rods?
Use the interactivity to help get a feel for this problem and to find out all the possible ways the balls could land.
Place six toy ladybirds into the box so that there are two ladybirds in every column and every row.
How many trains can you make which are the same length as Matt's and Katie's, using rods that are identical?
An animation that helps you understand the game of Nim.
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....?
What is the greatest number of squares you can make by overlapping three squares?
Explore this interactivity and see if you can work out what it does. Could you use it to estimate the area of a shape?
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?
Stop the Clock game for an adult and child. How can you make sure you always win this game?
Board Block game for two. Can you stop your partner from being able to make a shape on the board?
Seeing Squares game for an adult and child. Can you come up with a way of always winning this game?
Train game for an adult and child. Who will be the first to make the train?
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.
In this activity, the computer chooses a times table and shifts it. Can you work out the table and the shift each time?
How good are you at estimating angles?
Place the numbers 1 to 10 in the circles so that each number is the difference between the two numbers just below it.
A simple spinner that is equally likely to land on Red or Black. Useful if tossing a coin, dropping it, and rummaging about on the floor have lost their appeal. Needs a modern browser; if IE then at. . . .
Use this animation to experiment with lotteries. Choose how many balls to match, how many are in the carousel, and how many draws to make at once.
This game challenges you to locate hidden triangles in The White Box by firing rays and observing where the rays exit the Box.
This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?
Here is a chance to play a version of the classic Countdown Game.
Use the clues to colour each square.
A game for two people that can be played with pencils and paper. Combine your knowledge of coordinates with some strategic thinking.
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.
A game for 1 or 2 people. Use the interactive version, or play with friends. Try to round up as many counters as possible.
A game to be played against the computer, or in groups. Pick a 7-digit number. A random digit is generated. What must you subract to remove the digit from your number? the first to zero wins.
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?
An odd version of tic tac toe
A game for 1 person. Can you work out how the dice must be rolled from the start position to the finish? Play on line.