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I wonder what answers your class would give to this question. In a research project a few years ago I asked children of all ages what they thought maths was all about, and why they learned it at school. The answers were, in my view, depressing, and I would be prepared to hazard a guess that they would be much the same ten years on.

If you ask mathematicians what maths is, they will usually answer something along the lines of ‘the study of patterns’. Ask most children what they think maths is and they will say it’s all about rules which they need to learn, or facts they have to remember. Ask them why they learn maths and the most frequent answers include something about passing tests, or perhaps being better at handling money when shopping. Those answers arise because many children don't experience real mathematics in their classrooms – they get a proxy for it.

What children should be doing is solving problems, their own as well as those posed by others. Because the

So how does problem solving figure in the new National Curriculum which was implemented in autumn 2014? The document says:

Reading further:

'The national curriculum for mathematics aims to ensure that all pupils.....become fluent......reason mathematically..... and can solve problems.'

Many teachers never return to the aims after an initial read, moving straight away to the content of the curriculum, but these are important statements because they will determine the focus of accountability measures, such as national test scores and Ofsted visits, and so they merit some attention!In his chapter on thinking mathematically (1992), Alan Schoenfeld suggests that whilst the idea of

At one extreme we have sets of 'problems' which are all about practising a technique. In the classroom this typically involves the teacher introducing a task and illustrating the technique, and then the children do lots more 'problems' on the same theme so that they master the technique which becomes part of their mathematical toolkit. Problem solving is interpreted as working through a series of related and predictable questions in order to acquire a particular skill.

However an alternative interpretation, and one which NRICH aims to exemplify, is that of Polya (1945). Problem solving in Polya's view is about engaging with real problems; guessing, discovering, and making sense of mathematics. (Real problems don't have to be 'real world' applications, they can be within mathematics itself. The main criterion is that they should be non-routine and new to the student.) Compared to the interpretation as a set of questions on a theme, Polya's is a much more challenging interpretation of problem solving for a teacher to come to terms with, but has the potential to be much more effective in developing young mathematicians who have an 'understanding of the world, the ability to reason mathematically, an appreciation of the beauty and power of mathematics and a sense of enjoyment and curiosity about the subject'. For Polya, problem solving is:

- seeking solutions not just memorising procedures
- exploring patterns not just memorising formulas
- formulating conjectures, not just doing exercises.

Noah is an example of a real problem for KS1 children. It's a real problem because it's unlikely that the children will have seen it before so they have to work out what to do - a problem is only a problem if you don't know what to do. If you do know what to do, it's not a problem! Given a free choice, some children will make animals out of materials around the classroom, others will record on paper. They'll do some guessing, some discovering and as they work they will be being introduced to, or will consolidate, all sorts of ideas in number such as different ways to make 12, or the concept of odd and even. And when they have finished they will have produced something that is unique to them and which hopefully they will be proud of!

Planning a School Trip is a totally different sort of problem for KS2 pupils. They work in small groups to identify the information they need to organise an event, in this case a school trip. Again they'll do some guessing, some discovering and refining and as they work they will be being introduced to, or will consolidate, all sorts of calculation strategies. On the way they will have to have negotiated with the rest of their team, and shared their ways of working and how they arrived at their conclusion - all good communication skills.

Nearly every other task on the NRICH site fits most of the criteria for a rich problem. By reading the teachers' notes you can get a sense of how a lesson might proceed, but, given the freedom to do so, children can take the question in an unexpected direction so you may be surprised at the outcomes. If you can be open to such results, not only will your children learn more and become more independent, but you will be helping them to see mathematics as the creative subject it is.

So you may want to think about how you can put problem solving at the heart of your maths teaching - it shouldn't be an optional extra for Friday afternoons or a special activity to be done when you have finished everything else. Problem solving is the essence of being a mathematician. And isn't that what we're trying to produce?

Polya, G. 1945) How to Solve It. Princeton University Press

Schoenfeld, A.H. (1992) Learning to think mathematically: problem solving, metacognition and sense-making in mathematics. In D.Grouws (ed)