An environment which simulates working with Cuisenaire rods.
Here are some rods that are different colours. How could I make a dark green rod using yellow and white rods?
Can you work out how to balance this equaliser? You can put more than one weight on a hook.
Ben and his mum are planting garlic. Use the interactivity to help you find out how many cloves of garlic they might have had.
How many trains can you make which are the same length as Matt's, using rods that are identical?
Match the halves.
If you hang two weights on one side of this balance, in how many different ways can you hang three weights on the other side for it to be balanced?
An odd version of tic tac toe
Take it in turns to place a domino on the grid. One to be placed horizontally and the other vertically. Can you make it impossible for your opponent to play?
Use the Cuisenaire rods environment to investigate ratio. Can you find pairs of rods in the ratio 3:2? How about 9:6?
Move just three of the circles so that the triangle faces in the opposite direction.
Choose four of the numbers from 1 to 9 to put in the squares so that the differences between joined squares are odd.
How many different ways can you find to join three equilateral triangles together? Can you convince us that you have found them all?
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?
Incey Wincey Spider game for an adult and child. Will Incey get to the top of the drainpipe?
Can you hang weights in the right place to make the equaliser balance?
Can you cover the camel with these pieces?
Investigate the smallest number of moves it takes to turn these mats upside-down if you can only turn exactly three at a time.
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.
Three beads are threaded on a circular wire and are coloured either red or blue. Can you find all four different combinations?
Twenty four games for the run-up to Christmas.
Use the interactivity to help get a feel for this problem and to find out all the possible ways the balls could land.
Can you make a train the same length as Laura's but using three differently coloured rods? Is there only one way of doing it?
Can you find all the different ways of lining up these Cuisenaire rods?
Find out what a "fault-free" rectangle is and try to make some of your own.
Explore the different tunes you can make with these five gourds. What are the similarities and differences between the two tunes you are given?
Place the numbers 1 to 6 in the circles so that each number is the difference between the two numbers just below it.
Work out the fractions to match the cards with the same amount of money.
Use the information about Sally and her brother to find out how many children there are in the Brown family.
How many different triangles can you draw on the dotty grid which each have one dot in the middle?
If there are 3 squares in the ring, can you place three different numbers in them so that their differences are odd? Try with different numbers of squares around the ring. What do you notice?
Train game for an adult and child. Who will be the first to make the train?
A train building game for 2 players.
A variant on the game Alquerque
Investigate the different sounds you can make by putting the owls and donkeys on the wheel.
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?
Can you use the numbers on the dice to reach your end of the number line before your partner beats you?
A game for 2 people that everybody knows. You can play with a friend or online. If you play correctly you never lose!
Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.
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?
Use the blue spot to help you move the yellow spot from one star to the other. How are the trails of the blue and yellow spots related?
How many different rhythms can you make by putting two drums on the wheel?
Can you put the numbers 1 to 8 into the circles so that the four calculations are correct?
Use the number weights to find different ways of balancing the equaliser.
An interactive activity for one to experiment with a tricky tessellation
What are the coordinates of the coloured dots that mark out the tangram? Try changing the position of the origin. What happens to the coordinates now?
A tetromino is made up of four squares joined edge to edge. Can this tetromino, together with 15 copies of itself, be used to cover an eight by eight chessboard?
Choose the size of your pegboard and the shapes you can make. Can you work out the strategies needed to block your opponent?
If you can post the triangle with either the blue or yellow colour face up, how many ways can it be posted altogether?
If you have only four weights, where could you place them in order to balance this equaliser?