In this article for teachers, Bernard uses some problems to suggest that once a numerical pattern has been spotted from a practical starting point, going back to the practical can help explain. . . .
Make a clinometer and use it to help you estimate the heights of tall objects.
Make a spiral mobile.
Make an equilateral triangle by folding paper and use it to make patterns of your own.
You could use just coloured pencils and paper to create this design, but it will be more eye-catching if you can get hold of hammer, nails and string.
It might seem impossible but it is possible. How can you cut a playing card to make a hole big enough to walk through?
Follow these instructions to make a three-piece and/or seven-piece tangram.
A game to make and play based on the number line.
Make some celtic knot patterns using tiling techniques
This article for pupils gives an introduction to Celtic knotwork patterns and a feel for how you can draw them.
These are pictures of the sea defences at New Brighton. Can you work out what a basic shape might be in both images of the sea wall and work out a way they might fit together?
Which of the following cubes can be made from these nets?
Galileo, a famous inventor who lived about 400 years ago, came up with an idea similar to this for making a time measuring instrument. Can you turn your pendulum into an accurate minute timer?
Arrange your fences to make the largest rectangular space you can. Try with four fences, then five, then six etc.
This article for students gives some instructions about how to make some different braids.
Make your own double-sided magic square. But can you complete both sides once you've made the pieces?
Make a mobius band and investigate its properties.
Using these kite and dart templates, you could try to recreate part of Penrose's famous tessellation or design one yourself.
Make a ball from triangles!
How can you make an angle of 60 degrees by folding a sheet of paper twice?
Make a cube with three strips of paper. Colour three faces or use the numbers 1 to 6 to make a die.
Surprise your friends with this magic square trick.
Time for a little mathemagic! Choose any five cards from a pack and show four of them to your partner. How can they work out the fifth?
How is it possible to predict the card?
How many differently shaped rectangles can you build using these equilateral and isosceles triangles? Can you make a square?
Have a go at drawing these stars which use six points drawn around a circle. Perhaps you can create your own designs?
How can you make a curve from straight strips of paper?
Did you know mazes tell stories? Find out more about mazes and make one of your own.
Have you noticed that triangles are used in manmade structures? Perhaps there is a good reason for this? 'Test a Triangle' and see how rigid triangles are.
Use the tangram pieces to make our pictures, or to design some of your own!
Can you order pictures of the development of a frog from frogspawn and of a bean seed growing into a plant?
What shapes can you make by folding an A4 piece of paper?
Paint a stripe on a cardboard roll. Can you predict what will happen when it is rolled across a sheet of paper?
Exploring balance and centres of mass can be great fun. The resulting structures can seem impossible. Here are some images to encourage you to experiment with non-breakable objects of your own.
This is the second in a twelve part introduction to Logo for beginners. In this part you learn to draw polygons.
Can you puzzle out what sequences these Logo programs will give? Then write your own Logo programs to generate sequences.
Our 2008 Advent Calendar has a 'Making Maths' activity for every day in the run-up to Christmas.
It's hard to make a snowflake with six perfect lines of symmetry, but it's fun to try!
A group of children are discussing the height of a tall tree. How would you go about finding out its height?
Use the interactivity to play two of the bells in a pattern. How do you know when it is your turn to ring, and how do you know which bell to ring?
Follow these instructions to make a five-pointed snowflake from a square of paper.
A game in which players take it in turns to choose a number. Can you block your opponent?
Kaia is sure that her father has worn a particular tie twice a week in at least five of the last ten weeks, but her father disagrees. Who do you think is right?
Write a Logo program, putting in variables, and see the effect when you change the variables.
More Logo for beginners. Now learn more about the REPEAT command.
Turn through bigger angles and draw stars with Logo.
Delight your friends with this cunning trick! Can you explain how it works?
Learn how to draw circles using Logo. Wait a minute! Are they really circles? If not what are they?
Learn to write procedures and build them into Logo programs. Learn to use variables.
The triangle ABC is equilateral. The arc AB has centre C, the arc BC has centre A and the arc CA has centre B. Explain how and why this shape can roll along between two parallel tracks.