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Multiples Sudoku
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Multiples Sudoku

11 to 14
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Each clue in this Sudoku is the product of the two numbers in adjacent cells.

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?

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?
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.
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.

Light weights
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Light Weights

16 to 18
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See how the weight of weights varies across the globe.

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