This article for pupils gives an introduction to Celtic knotwork
patterns and a feel for how you can draw them.
Make a clinometer and use it to help you estimate the heights of
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
Make some celtic knot patterns using tiling techniques
Make an equilateral triangle by folding paper and use it to make
patterns of your own.
It might seem impossible but it is possible. How can you cut a
playing card to make a hole big enough to walk through?
This article for students gives some instructions about how to make some different braids.
This practical activity involves measuring length/distance.
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.
Make a spiral mobile.
Can you order pictures of the development of a frog from frogspawn
and of a bean seed growing into a plant?
More Logo for beginners. Now learn more about the REPEAT command.
Turn through bigger angles and draw stars with Logo.
Make a cube out of straws and have a go at this practical
Logo helps us to understand gradients of lines and why Muggles Magic is not magic but mathematics. See the problem Muggles magic.
Can you puzzle out what sequences these Logo programs will give? Then write your own Logo programs to generate sequences.
Write a Logo program, putting in variables, and see the effect when you change the variables.
Learn about Pen Up and Pen Down in Logo
Exploring and predicting folding, cutting and punching holes and
What do these two triangles have in common? How are they related?
Learn how to draw circles using Logo. Wait a minute! Are they really circles? If not what are they?
This practical problem challenges you to make quadrilaterals with a loop of string. You'll need some friends to help!
Learn to write procedures and build them into Logo programs. Learn to use variables.
How can you put five cereal packets together to make different
shapes if you must put them face-to-face?
What happens when a procedure calls itself?
This part introduces the use of Logo for number work. Learn how to use Logo to generate sequences of numbers.
How many differently shaped rectangles can you build using these
equilateral and isosceles triangles? Can you make a square?
More Logo for beginners. Learn to calculate exterior angles and draw regular polygons using procedures and variables.
Follow the diagrams to make this patchwork piece, based on an
octagon in a square.
Using different numbers of sticks, how many different triangles are
you able to make? Can you make any rules about the numbers of
sticks that make the most triangles?
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?
Can you make the most extraordinary, the most amazing, the most
unusual patterns/designs from these triangles which are made in a
Looking at the picture of this Jomista Mat, can you decribe what
you see? Why not try and make one yourself?
This practical problem challenges you to create shapes and patterns
with two different types of triangle. You could even try
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.
Here is a solitaire type environment for you to experiment with. Which targets can you reach?
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?
NRICH December 2006 advent calendar - a new tangram for each day in
the run-up to Christmas.
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?
An activity making various patterns with 2 x 1 rectangular tiles.
Ideas for practical ways of representing data such as Venn and
In how many ways can you fit two of these yellow triangles
together? Can you predict the number of ways two blue triangles can
be fitted together?
Where can you put the mirror across the square so that you can still "see" the whole square? How many different positions are possible?
Are all the possible combinations of two shapes included in this
set of 27 cards? How do you know?
Investigate the smallest number of moves it takes to turn these
mats upside-down if you can only turn exactly three at a time.
Starting with four different triangles, imagine you have an
unlimited number of each type. How many different tetrahedra can
you make? Convince us you have found them all.
Can you make the birds from the egg tangram?
Here's a simple way to make a Tangram without any measuring or
Use the lines on this figure to show how the square can be divided into 2 halves, 3 thirds, 6 sixths and 9 ninths.
Can you deduce the pattern that has been used to lay out these