List

Primary Toughnuts



We sometimes have unsolved problems which require solutions. If there are any below, do consider having a go at them, and send us your solutions.

You may be interested in the article we have written, which explains what we are looking for when we decide which solutions to publish.

Pattern and Structure
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Pattern and Structure

Age
3 to 11
The tasks in this feature for Primary teachers will help you to develop learners' awareness of pattern and will serve as a springboard to exploring mathematical structures.
The Value of Two
article

The Value of Two

Ruth Trundley outlines her doctoral research and concludes that development of an understanding of cardinality is a crucial element of counting that can be overlooked.
Developing Number Through Tidying Up
article

Developing Number Through Tidying Up

This article describes how one nursery setting focused on tidying up time as a context in which to explicitly target the development of number and calculation skills.
Placeholder: several colourful numbers
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Working with a grown-up?

Age
3 to 7
Lower primary tasks designed for an adult and child to work on together, adapted from some of our activities for developing group-working skills.
Young Children's Mathematical Recording
article

Young Children's Mathematical Recording

In this article, Janine Davenall reflects on children's personalised mathematical recordings as part of a small research project based in her Reception class.
Early Number Sense
article

Early Number Sense

This article explores the basic foundations of number sense and outlines relevant research in this area.
Subitising
article

Subitising

In this article for EY practitioners, Dr Sue Gifford outlines what we mean by subitising and how we can teach it.
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article

Rich mathematics

In this very brief article, the NRICH Team outlines what they understand by the term 'rich mathematics'.
Dot Card Games
article

Dot Card Games

These games devised by Jenni Way use dot cards which will help children see the structure of numbers 1-6 and give them confidence as they begin to add and subtract these numbers.
Models in mind
article

Models in mind

This article looks at how models support mathematical thinking about numbers and the number system
Maths at Home
article

Maths at Home

This article for teachers, parents and carers offers guidance on how learners can get the most out of the activities in our Maths at Home features.
Ten-frames Games
article

Ten-frames Games

These games use ten-frames to develop children's 'sense of ten'.
Using dice games in the classroom
article

Using dice games in the classroom

This article outlines some of the benefits of using dice games in the classroom, especially as a tool for formative assessment.
Welcoming Your New Class
article

Welcoming Your New Class

What might your first lesson with a new class look like? In this article, Cherri Moseley makes some suggestions for primary teachers.
Getting the balance right
article

Getting the balance right

In this article for primary teachers, Ems shares some common misconceptions surrounding the equals sign, and suggests ways to help learners develop their understanding.
Red or Black Spinner
interactivity

Red or Black Spinner

A simple spinner that is equally likely to land on Red or Black. Useful if tossing a coin, dropping it, and rummaging about on the floor have lost their appeal. Needs a modern browser; if IE then at least version 9.
Seesaw Shenanigans
problem
Favourite

Seesaw Shenanigans

Age
3 to 7
Challenge level
filled star empty star empty star

A group of animals has made a seesaw in the woods. How can you make the seesaw balance?

Statistics
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Statistics

Age
5 to 11
This collection of activities covers the areas of probability and collecting and analysing data.
Handling Data
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Handling Data

Age
5 to 11
This collection of activities covers the areas of probability and collecting and analysing data.
Natural Born Mathematicians
article

Natural Born Mathematicians

Helen Joyce interviews the neuropsychologist Brian Butterworth whose research has shown that we are all born with a "built-in" sense of cardinal number.
The development of spatial and geometric thinking: 5 to 18
article

The development of spatial and geometric thinking: 5 to 18

This is the first article in a series which aim to provide some insight into the way spatial thinking develops in children, and draw on a range of reported research. The focus of this article is the work of Piaget and Inhelder.
Flexibility in Geometry
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Flexibility in Geometry

Age
5 to 11
In this feature for Primary teachers, you will find tasks to help learners develop their flexibility in a geometrical context.
Handling data ( Statistics)
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Handling data ( Statistics)

Age
5 to 11
These challenges will test your understanding of information, as well as how likely different events are.
Adding with the Abacus
article

Adding with the Abacus

Nowadays the calculator is very familiar to many of us. What did people do to save time working out more difficult problems before the calculator existed?
Shape Your Proof
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Shape Your Proof

Age
5 to 11
In this feature for Primary students, we offer geometrical tasks which give you the chance to notice patterns, make conjectures and create convincing mathematical arguments.
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Maths Explorers

Age
5 to 7
Are you a maths detective? Choose a task and use your mathematical skills to solve the problem.
Puzzling with Paper
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Puzzling with Paper

Age
5 to 11
These tasks offer opportunities for deepening learners' mathematical understanding and their positive learning dispositions.
Getting Better at Group Work Lower Primary
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Getting Better at Group Work Lower Primary

Age
5 to 7
Three or four brains are usually better than one! Working on a problem in a group rather than on your own is often a good idea. These activities will help you get better at group work.
Measurement
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Measurement

Age
5 to 11
These activities are all about measuring different things, including time! Can you try and make a sensible guess about the size of something before you measure it?
Primary Proof?
article

Primary Proof?

Proof does have a place in Primary mathematics classrooms, we just need to be clear about what we mean by proof at this level.
From Playing to Explaining
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From Playing to Explaining

Age
5 to 11
The tasks in this feature encourage you to play and explore, then think deeply about the mathematical ideas underneath.
Placeholder: several colourful numbers
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Codebreakers

Age
5 to 7
Are you a maths detective? Choose a task and use your mathematical skills to solve the problem.