This article stems from research on the teaching of proof and offers guidance on how to move learners from focussing on experimental arguments to mathematical arguments and deductive reasoning.

In this article, the NRICH team describe the process of selecting solutions for publication on the site.

In this article for teachers, Bernard gives some background about the theme for November 2011's primary activities, which focus on analysing different approaches.

It began in Devon in 2008. The Maths Team was keen to raise the profile of mathematics investigations and further promote mathematical thinking and problem solving in primary classes. Liz was invited. . . .

This is the second part of an article describing the ‘Enriching Mathematics’ project in Devon. The participating teachers describe NRICH activities they have tried with their learners.

This article for teachers describes NRICH's work with Creative Partnerships and three Bristol primary schools.

This article explores what LTHC tasks are and why they are a firm favourite here at NRICH. We recommend that you start by reading the article to understand what makes a task LTHC and then delve into. . . .

In this article for teachers, Bernard describes ways to challenge higher-attaining children at primary level.

Jenny Piggott reflects on the event held to mark her retirement from the directorship of NRICH, but also on problem solving itself.

In this article for teachers, Liz Woodham describes resources on NRICH that can help primary-aged children get to grips with negative numbers.

This article for teachers suggests a range of activities to help children get better at working in groups.

This article for teachers explains why geoboards are such an invaluable resource and introduces several tasks which make use of them.

This short article outlines a few activities which make use of interlocking cubes.

This article, written for primary teachers, links to rich tasks which will help develop the underlying concepts associated with fractions and offers some suggestions for models and images that help. . . .

Is problem solving at the heart of your curriculum? In this article for teachers, Lynne explains why it should be.

This article for teachers outlines one school's research project to explore how children, girls in particular, could be motivated in Maths through a more practical approach.

In this article for teachers, Lynne explains the difference between 'rich tasks' and 'low threshold high ceiling' tasks, using examples from the website.

The NRICH team are always looking for new ways to engage teachers and pupils in problem solving. Here we explain the thinking behind maths trails.

In this article for teachers, Liz Woodham describes conversations with Luke, aged 7, as they worked on some mathematics together.

Being stuck is usually thought of as being a negative state of affairs. We want our pupils to succeed, not to struggle. Or do we? This article discusses why being stuck can be fruitful.

This professional development activity encourages you to investigate what pupils are doing when they problem solving.

This professional development activity looks at what teachers can do to support learners engaging with rich tasks

The aim of this professional development activity is to successfully integrate some rich tasks into your curriculum planning.

This professional development activity encourages you to investigate what is meant by higher-order thinking skills.

Creativity in the mathematics classroom is not just about what pupils do but also what we do as teachers. If we are thinking creatively about the mathematical experiences we offer our pupils we can. . . .

This professional development activity encourages you to investigate how rich tasks and problem solving link together.

This professional development activity is designed to help you assess your embedding of rich tasks into the curriculum through evaluating a theme

This article is based on some of the ideas that emerged during the production of a book which takes visualising as its focus. We began to identify problems which helped us to take a structured view. . . .

In this article, Jennifer Piggott talks about just a few of the problems with problems that make them such a rich source of mathematics and approaches to learning mathematics.

Basic strategy games are particularly suitable as starting points for investigations. Players instinctively try to discover a winning strategy, and usually the best way to do this is to analyse. . . .

Kirsti Ashworth, an NRICH Teacher Fellow, talks about her experiences of using rich tasks.

This professional development activity is designed to help you assess your embedding of rich tasks into the curriculum and, in particular, think about what to do next

Need some help getting started with solving and thinking about rich tasks? Read on for some friendly advice.

Here are examples of how two schools set about the task of ensuring that problem solving was an integral part of their curriculum.

Bernard Bagnall looks at what 'problem solving' might really mean in the context of primary classrooms.