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Sissa's Reward
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Sissa's reward

11 to 14
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Sissa cleverly asked the King for a reward that sounded quite modest but turned out to be rather large...

Square coordinates
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Square coordinates

11 to 14
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A tilted square is a square with no horizontal sides. Can you devise a general instruction for the construction of a square when you are given just one of its sides?

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Poly plug pattern

5 to 7
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Create a pattern on the small grid. How could you extend your pattern on the larger grid?

Markov Matrices
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Markov matrices

14 to 18
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Use matrices to find out how much cake I eat.
Outside the Box
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Outside the box

7 to 14
This article explores the links between maths, art and history, and suggests investigations that are enjoyable as well as challenging.
When letters are numbers
article

When letters are numbers

5 to 14
Most primary teachers are not maths specialists. Do letters seem threatening when they are not in words? How can we minimise what seems to be the difference between primary and secondary approaches to the beginning of algebra?
Choosing rich tasks for secondary classes
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Choosing rich tasks for secondary classes

11 to 16
In this article, read about the thinking behind the September 2010 secondary problems and why we hope they will be an excellent selection for a new academic year.
Quaternions and Rotations
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Quaternions and rotations

16 to 18
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Find out how the quaternion function G(v) = qvq^-1 gives a simple algebraic method for working with rotations in 3-space.
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