If these balls are put on a line with each ball touching the one in front and the one behind, which arrangement makes the shortest line of balls?

How can you make an angle of 60 degrees by folding a sheet of paper twice?

Have a go at drawing these stars which use six points drawn around a circle. Perhaps you can create your own designs?

Make an equilateral triangle by folding paper and use it to make patterns of your own.

Make a clinometer and use it to help you estimate the heights of tall objects.

Surprise your friends with this magic square trick.

Make a mobius band and investigate its properties.

This package contains hands-on code breaking activities based on the Enigma Schools Project. Suitable for Stages 2, 3 and 4.

Make some celtic knot patterns using tiling techniques

How can you make a curve from straight strips of paper?

Make your own double-sided magic square. But can you complete both sides once you've made the pieces?

It might seem impossible but it is possible. How can you cut a playing card to make a hole big enough to walk through?

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.

Follow these instructions to make a three-piece and/or seven-piece tangram.

A game to make and play based on the number line.

Using these kite and dart templates, you could try to recreate part of Penrose's famous tessellation or design one yourself.

Make a cube with three strips of paper. Colour three faces or use the numbers 1 to 6 to make a die.

How many differently shaped rectangles can you build using these equilateral and isosceles triangles? Can you make a square?

What is the largest number of circles we can fit into the frame without them overlapping? How do you know? What will happen if you try the other shapes?

What do these two triangles have in common? How are they related?

Turn through bigger angles and draw stars with Logo.

Use the tangram pieces to make our pictures, or to design some of your own!

What happens to the area of a square if you double the length of the sides? Try the same thing with rectangles, diamonds and other shapes. How do the four smaller ones fit into the larger one?

This article for pupils gives an introduction to Celtic knotwork patterns and a feel for how you can draw them.

This article for students gives some instructions about how to make some different braids.

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.

Looking at the picture of this Jomista Mat, can you decribe what you see? Why not try and make one yourself?

Arrange your fences to make the largest rectangular space you can. Try with four fences, then five, then six etc.

Arrange your fences to make the largest rectangular space you can. Try with four fences, then five, then six etc.

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. . . .

These practical challenges are all about making a 'tray' and covering it with paper.

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?

Design and construct a prototype intercooler which will satisfy agreed quality control constraints.

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

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?

I start with a red, a blue, a green and a yellow marble. I can trade any of my marbles for three others, one of each colour. Can I end up with exactly two marbles of each colour?

More Logo for beginners. Learn to calculate exterior angles and draw regular polygons using procedures and variables.

Are all the possible combinations of two shapes included in this set of 27 cards? How do you know?

Did you know mazes tell stories? Find out more about mazes and make one of your own.

Learn how to draw circles using Logo. Wait a minute! Are they really circles? If not what are they?

I start with a red, a green and a blue marble. I can trade any of my marbles for two others, one of each colour. Can I end up with five more blue marbles than red after a number of such trades?

This part introduces the use of Logo for number work. Learn how to use Logo to generate sequences of numbers.

This practical problem challenges you to make quadrilaterals with a loop of string. You'll need some friends to help!

How can you put five cereal packets together to make different shapes if you must put them face-to-face?

Learn to write procedures and build them into Logo programs. Learn to use variables.

Logo helps us to understand gradients of lines and why Muggles Magic is not magic but mathematics. See the problem Muggles magic.

An activity making various patterns with 2 x 1 rectangular tiles.

Ideas for practical ways of representing data such as Venn and Carroll diagrams.