A game for 2 people. Take turns joining two dots, until your opponent is unable to move.
I found these clocks in the Arts Centre at the University of Warwick intriguing - do they really need four clocks and what times would be ambiguous with only two or three of them?
This article is based on some of the ideas that emerged during the production of a book which takes visualising as its focus. We began to identify problems which helped us to take a structured view. . . .
What can you see? What do you notice? What questions can you ask?
Can you fit the tangram pieces into the outline of the plaque design?
What is the shape of wrapping paper that you would need to completely wrap this model?
This article for teachers discusses examples of problems in which there is no obvious method but in which children can be encouraged to think deeply about the context and extend their ability to. . . .
A game for two players. You'll need some counters.
An extension of noughts and crosses in which the grid is enlarged and the length of the winning line can to altered to 3, 4 or 5.
Imagine a 4 by 4 by 4 cube. If you and a friend drill holes in some of the small cubes in the ways described, how many will not have holes drilled through them?
If you can post the triangle with either the blue or yellow colour face up, how many ways can it be posted altogether?
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?
How can the same pieces of the tangram make this bowl before and after it was chipped? Use the interactivity to try and work out what is going on!
Can you fit the tangram pieces into the outlines of the convex shapes?
Imagine a wheel with different markings painted on it at regular intervals. Can you predict the colour of the 18th mark? The 100th mark?
Can you work out what is wrong with the cogs on a UK 2 pound coin?
Imagine a 3 by 3 by 3 cube. If you and a friend drill holes in some of the small cubes in the ways described, how many will have holes drilled through them?
This problem invites you to build 3D shapes using two different triangles. Can you make the shapes from the pictures?
Have a go at making a few of these shapes from paper in different sizes. What patterns can you create?
These points all mark the vertices (corners) of ten hidden squares. Can you find the 10 hidden squares?
Lyndon Baker describes how the Mobius strip and Euler's law can introduce pupils to the idea of topology.
This article looks at levels of geometric thinking and the types of activities required to develop this thinking.
What happens when you turn these cogs? Investigate the differences between turning two cogs of different sizes and two cogs which are the same.
A hundred square has been printed on both sides of a piece of paper. What is on the back of 100? 58? 23? 19?
A game for 2 players. Given a board of dots in a grid pattern, players take turns drawing a line by connecting 2 adjacent dots. Your goal is to complete more squares than your opponent.
Which of these dice are right-handed and which are left-handed?
Here are shadows of some 3D shapes. What shapes could have made them?
Investigate how the four L-shapes fit together to make an enlarged L-shape. You could explore this idea with other shapes too.
Imagine a 3 by 3 by 3 cube made of 9 small cubes. Each face of the large cube is painted a different colour. How many small cubes will have two painted faces? Where are they?
Each of the nets of nine solid shapes has been cut into two pieces. Can you see which pieces go together?
Investigate the number of paths you can take from one vertex to another in these 3D shapes. Is it possible to take an odd number and an even number of paths to the same vertex?
Which of the following cubes can be made from these nets?
Mathematics is the study of patterns. Studying pattern is an opportunity to observe, hypothesise, experiment, discover and create.
How many balls of modelling clay and how many straws does it take to make these skeleton shapes?
We start with one yellow cube and build around it to make a 3x3x3 cube with red cubes. Then we build around that red cube with blue cubes and so on. How many cubes of each colour have we used?
Start with a large square, join the midpoints of its sides, you'll see four right angled triangles. Remove these triangles, a second square is left. Repeat the operation. What happens?
Can you work out what shape is made when this piece of paper is folded up using the crease pattern shown?
Paint a stripe on a cardboard roll. Can you predict what will happen when it is rolled across a sheet of paper?
This second article in the series refers to research about levels of development of spatial thinking and the possible influence of instruction.
Can you fit the tangram pieces into the outlines of the numbers?
Can you fit the tangram pieces into the silhouette of the junk?
Can you fit the tangram pieces into the outlines of Mah Ling and Chi Wing?
Can you fit the tangram pieces into the outline of the playing piece?
Can you fit the tangram pieces into the outline of the clock?
Can you fit the tangram pieces into the outline of Granma T?
Can you fit the tangram pieces into the outlines of the rabbits?
Can you fit the tangram pieces into the outlines of the chairs?
Can you fit the tangram pieces into the outline of the dragon?
Can you fit the tangram pieces into the outlines of Wai Ping, Wu Ming and Chi Wing?
Read about the adventures of Granma T and her grandchildren in this series of stories, accompanied by interactive tangrams.