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Data shapes
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Data Shapes

5 to 7
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Sara and Will were sorting some pictures of shapes on cards. "I'll collect the circles," said Sara. "I'll take the red ones," answered Will. Can you see any cards they would both want?

swimming pool
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Swimming Pool

5 to 11
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In this problem, we're investigating the number of steps we would climb up or down to get out of or into the swimming pool. How could you number the steps below the water?

The Four Colour Theorem
article

The Four Colour Theorem

11 to 16
The Four Colour Conjecture was first stated just over 150 years ago, and finally proved conclusively in 1976. It is an outstanding example of how old ideas can be combined with new discoveries. prove a mathematical theorem.
Going For Games
article

Going for Games

5 to 11
In this article for teachers, Liz Woodham describes the criteria she uses to choose mathematical games for the classroom and shares some examples from NRICH.
A Problem is a problem for all that...
article

A Problem Is a Problem for All That...

The very problem with problems, namely that they should result in you being stuck, is at the heart of what problem-solving is about. In this article for teachers I talk about just a few of the other problems with problems that make them such a rich source of mathematics.
Mixing Lemonade
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Mixing Lemonade

11 to 14
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Can you work out which drink has the stronger flavour?

Network Trees
problem

Network Trees

14 to 18
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Explore some of the different types of network, and prove a result about network trees.

Zios and Zepts
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Zias and Zepts

7 to 11
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On the planet Vuv there are two sorts of creatures. The Zias have 3 legs and the Zepts have 7 legs. The great planetary explorer Nico counted 52 legs. How many Zias and how many Zepts were there?

Pupils' recording or pupils recording
article

Pupils' Recording or Pupils Recording

5 to 14
This article, written for teachers, looks at the different kinds of recordings encountered in Primary Mathematics lessons and the importance of not jumping to conclusions!
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