Inquiry Maths posts
What do we mean by inquiry in mathematics classrooms?
posted 14 Aug 2017, 13:05 by Andrew Blair [ updated 14 Aug 2017, 13:20 ]
What do we mean by inquiry in mathematics classrooms? The August newsletter from Mathematics by Inquiry (reSolve) includes two classroom tasks the project has developed. The tasks focus on how algebra can develop as generalised arithmetic. They encourage children to reason by exploring and expressing mathematical structure, pattern and relationships. The year 4 task is called Number Maze. The teacher sets pupils the task of moving through a number grid in a specified way so that the sum of the numbers in the cells they pass through is odd. The aim is summarised in this way: “Through the course of this task, students are encouraged to look at how many odd and even numbers are in each pathway. They see that an odd number of odds is always required to give an odd total.” The year 9 task Addition Chain follows the same course. The teacher requires a student to choose two numbers from which to start a chain where each term is the sum of the two previous terms. Once the chain has ten numbers, the teacher asks the class to find their total. Using the ‘trick’ that the total is 11 times the seventh number, the teacher announces the answer to the surprise of the class before students have the chance to begin the calculation. The teacher has used a property of the Fibonacci sequence. Starting with two numbers (a, b), the seventh term of the sequence is 5a + 8b and the sum of the first 10 terms is 55a + 88b. Both tasks combine the two key mathematical processes: inductive exploration and deductive reasoning. Students choose a particular case to explore before being introduced to an explanation of the general structure of the task. Source of inquiry In both reSolve tasks, the teacher starts by giving instructions. There is a little flexibility in how students carry out the instructions. In the year 4 task the children choose their own routes through the maze, but the teacher provides the maze used in the task and pupils can only move in prescribed ways. In the year 9 task students choose the two starting numbers, but again the process they follow is laid out in the teacher’s instructions. Explanation Once the realisation about odd numbers is reached in year 4 or the trick is understood in year 9, the teacher’s role is to generalise from particular cases. In year 4, the teacher introduces a visualisation through which pupils can ‘see’ why an odd number of odds is required. Similarly, the teacher introduces the algebraic form of the Fibonacci sequence to year 9. Students’ questions and regulation Students’ questions, which we at Inquiry Maths hold to be fundamental as a source of inquiry and as a precursor to teacher explanations, seem to have a limited role in reSolve classrooms. The description of the year 9 task states that with the introduction of the algebraic form “the door is opened here to many more mathematical investigations.” There follows a number of questions about how the task could proceed. It is not clear where the questions have come from. Are they examples of questions that students have posed in classrooms or are they suggested extensions from the task designers? In his introduction to the newsletter, Steve Thornton (reSolve Executive Director), says that “at each step of the lesson students learn through the teacher’s active intervention.” This suggests that the teacher poses the questions and students have the choice of which ones to follow. The restricted potential for students’ questions has a serious consequence when students do not or cannot follow the path laid out by the task designers. In the year 4 task, for example, it is not clear how pupils can influence the course of the inquiry if they do not notice what they are supposed to notice. Steve Thornton says that pupils are not expected to discover results in reSolve classrooms, but in the year 4 task they are encouraged to ‘see’ a specific mathematical property. While the distinction between discovering and ‘seeing’ might seem to rest on semantics, the more important point relates to how students can contribute to moving the inquiry forwards. The reSolve model lacks a studentdriven mechanism for overcoming an obstacle to inquiry, be it questions to the teacher or, as in the Inquiry Maths model, regulatory statements. Ultimately, the teacher has to tell the class what to ‘see’ in line with the design of the inquiry. Agency There seems little scope for students’ agency in the reSolve tasks. The teacher provides the source of the inquiry and its direction and the task designer determines the timing of the explanation. In the tasks we have reviewed the students have the opportunity to decide their own path through the maze or to select a pair of numbers to use, but these are limited responsibilities within closely defined parameters. In contradistinction, Inquiry Maths prompts establish a wider ‘landscape’ or ‘zone’ for exploration in which students have the space to ask questions and participate in directing the inquiry. From an Inquiry Maths perspective, we might call the reSolve tasks ‘enquiries’. They are restricted to a predetermined outcome and fit neatly into a standalone lesson. Of course, each task could open up into a wider inquiry. Year 4 pupils could suggest changes to the maze or to the rules for moving between the cells or to the type of result. Year 9 students could suggest changes to the rule for summing the terms of the sequence. While the task designers might welcome “alternate representations” judging by the content of reSolve’s second professional learning module, the reSolve model itself does not make students' questions and suggestions an integral part of inquiry. Andrew Blair August 2017 
Inquiry is not discovery learning
posted 25 Jun 2017, 09:23 by Andrew Blair [ updated 2 Jul 2017, 08:49 ]
Inquiry is NOT discovery learning If we were to believe the critics, classroom inquiry is just another variation of discovery learning. Citing their favourite article, they conflate teaching models under the umbrella term ‘minimal guidance’. Rather than analyse the specific nature of each model, the critics lazily dismiss one by association with the perceived weaknesses of another. In the learning of mathematics, discovery and inquiry are very different processes. Discovery In discovery learning, students are expected to derive a procedure or concept from an activity devised by the teacher. For example, a class might be required to work out the areas of squares on the sides of rightangled triangles and then notice that the sum of the areas of the squares on the two short sides equals the area of the square on the hypotenuse. This ‘discovery’ of Pythagoras’ Theorem can be a memorable and exciting experience. The theorem can seem novel, even when students find out later that it is well known. However, the discovery classroom is often an uncomfortable place for the teacher, especially in a subject like mathematics that is built on axioms and proof. The first problem occurs when students do not make the required discovery and ask for direction or clues. Teachers are forced into subterfuges such as pretending not to hear the student or replying that they are “not at liberty to say” or they “don’t know”. Another approach sees teachers assert that it is not in the interest of the students to be told and that finding the concept independently will “help them learn more”. A second problem occurs when the student makes the wrong discovery. In an attempt to tackle the misconception, while simultaneously preserving the potential for a correct discovery, the teacher gives hints such as “it’s not quite right” or asks whether the student has considered an alternative approach. A third problem arises when one student experiences the ‘aha’ moment and wants to share the discovery. The teacher is forced into attempting to quieten that student to avoid ruining the experience for the rest of the class. Inquiry The procedure or concept that appears at the end of the discovery process is incorporated into the course of an inquiry. It is used to answer students’ questions and develop their observations. In the rightangled triangles inquiry (see prompt right), for example, Pythagoras’ Theorem is deliberately introduced to pursue an inquiry pathway. The key issue for the teacher becomes how and when to introduce the theorem. Frequently in the initial phase of the inquiry, a student will ask if the length of the hypotenuse forms a linear sequence in the same way as the lengths of the short sides. (The word ‘hypotenuse’ could be introduced by the teacher when she reformulates a question about the ‘longest’ side.) Alternatively, if the question does not arise and the teacher aims to 'cover' the theorem through the inquiry, she might pose the question herself. In whatever way the question arises, the teacher has a number of options over how to proceed. She could decide to explain Pythagoras’ Theorem immediately; she could use the selection of the regulatory card 'Ask the teacher to explain' to justify an explanation; or, alternatively, she could ask students to research the theorem and report their findings to the class. The decision would depend on her evaluation of the appropriate level of inquiry for the class. An immediate explanation is characteristic of a structured inquiry, the use of the cards would form part of a guided approach and student research might indicate a more open inquiry. In discovery learning, the teacher attempts to preserve the pretence of discovery, even to the extent of withholding knowledge; in inquiry, the teacher, as a participant in the classroom activity, aims to introduce subjectspecific knowledge when it is most relevant and meaningful to her students. Andrew Blair June 2017 Continuum In response to the post, Mike Ollerton (@MichaelOllerton) wrote: I see discovery learning as a complementary subset of enquirybased learning. I do not see them in terms of a binary divide. At issue is when I choose to tell students something and when I choose not to; the intervention or interference continuum. Andrew Blair replies: There is a continuum in inquiry, but it relates to the level of control students have in directing the learning process. The aim is to develop their ability to regulate a mathematical inquiry. Rather than the teacher deciding when or when not to intervene, students learn how to overcome an impasse by requesting new knowledge. "I've discovered ..." In a recent Inquiry Maths workshop at a conference in Birmingham (UK) when participants were feeding back on progress in an inquiry, one teacher said "I've discovered ..." before correcting himself. He reminded the participants of a slide from a presentation at the start of the workshop that said inquiry is not discovery learning. However, inquiry does not preclude the discovery of novel pathways or applications of mathematics to the prompt. The point is that discovery of a concept or procedure is not the aim of inquiry. Leigh Taylor (@leigh_taylor13) inspired this post by asking on twitter for clarification about Inquiry Maths and discovery learning. 
Is inquiry agerelated?
posted 9 Apr 2017, 01:18 by Andrew Blair [ updated 9 Apr 2017, 10:06 ]
Is inquiry agerelated? Recently, on social media, Alycia Corey (@corey_alycia) asked if the levels of Inquiry Maths (structured, guided and open) are affected by the age of learners? This is an excellent question. Inquiry Maths was devised for secondary school classrooms. Unless children have been through an inquirybased curriculum (such as the PYP programme), there is little opportunity for them to learn how to inquire into academic domains. In consequence, structure is often necessary for secondary students to inquire constructively. Yet, at the other end of schooling, young children's inquiry might be inhibited by structure. They inquire naturally through play. Paradoxically, we might characterise early years as a time of open inquiry and secondary school as one of structured inquiry. The development from structured to open inquiry established in the hierarchical levels of Inquiry Maths appears to be reversed. This is the situation in most school systems. As children are institutionalised into the culture of traditional classrooms, they either learn to conform and comply, as is the case with the majority, or become the subject of ‘behaviour interventions’. Either way, inquiry processes disappear from formal schooling. A teacher wishing to introduce inquiry at secondary level faces obstacles created by conventional classroom practices and power relations. In most schools, then, the levels of inquiry are linked to the students’ prior experience of inquiry and the extent to which they demonstrate initiative and independence. These considerations are not related to age. That is not to say, however, that inquiry is not agerelated. Four years ago when advising a new 419 school about inquiry learning at different stages of schooling, I drew up a diagram of how the nature of mathematical inquiry changes. The diagram (right) assumed children are involved in open inquiry processes across the age ranges. The changes that occur in the three phases do not relate to inquiry processes per se, but rather to the consciousness children have of those processes in relation to the object of inquiry. While curiosity, noticing and questioning underlie all phases of inquiry, their content and form develop as children learn to direct inquiry at higher levels of subject knowledge. Firstly, children become more able to regulate their activity in a manner consistent with the domainspecific method of inquiry. Secondly, the object of inquiry changes: immediate perceptions in early years, experience of surroundings in primary and decontextualised stimuli in secondary. In mathematics, for example, students learn increasingly complex (and abstract) concepts, while simultaneously developing a more sophisticated understanding of the mathematical form of inquiry. Reflecting now on the diagram, it implies a rigidity between the age groups that is not warranted. The idea of play, for example, endures in the exploratory phases of later inquiries. Similarly, applications of abstract mathematics can be studied in practical projects at secondary level; just as prompts that focus on a mathematical object can be used at primary level when supported by concrete apparatus. Even if the phases of inquiry do not fit into neat categories, it is the case that open inquiry is agerelated; selfconsciousness develops and the object of inquiry changes as children grow older. However, the levels of Inquiry Maths are not related to age because they are designed for classrooms in which students do not normally have prior experience of inquiry processes. Andrew Blair April 2017 
Maths Inquiry Template
posted 29 Jan 2017, 12:27 by Andrew Blair [ updated 29 Jan 2017, 12:28 ]
Maths Inquiry Template Amelia O'Brien, a grade 6 PYP teacher at the Luanda International School (Angola), has shared her Maths Inquiry Template with Inquiry Maths. The template helps students think about concepts relevant to the prompt and plan the inquiry. In their most recent inquiry, Amelia's pupils posed generative questions that opened up new pathways for inquiry (see a report here under the title 'Questiondriven inquiry'). You can follow Amelia on twitter @_AmeliaOBrien. 
The teacher’s role in inquiry
posted 8 Jan 2017, 12:46 by Andrew Blair [ updated 9 Jan 2017, 13:07 ]
The teacher’s role in inquiry It is a common misconception that the inquiry teacher tries to do as little as possible in the classroom. For those who caricature inquiry as a discovery model, the teacher is obliged to let students develop concepts by themselves. For those who define inquiry as exclusively open learning, the teacher must refrain from intervening in order to allow students the freedom to find their own pathways. The first approach can lead to awkward interactions when the teacher refuses to give knowledge for fear of denying students the satisfaction of discovering it for themselves. The second approach often leads novice inquirers to complain that they “do not know what to do”. Even Dewey, who advocated experiential inquiry based on children’s lives in and outside school, did not encourage a passive role for the teacher. In Democracy and Education, he explains that the opposite of the teacher’s role in traditional teaching is not inaction, but rather participative activity: This does not mean that the teacher is to stand off and look on; the alternative to furnishing readymade subject matter and listening to the accuracy with which it is reproduced is not quiescence, but participation, sharing, in an activity. In such shared activity, the teacher is a learner, and the learner is, without knowing it, a teacher and upon the whole, the less consciousness there is, on either side, of either giving or receiving instruction, the better. (p. 188) Participation in the inquiry process requires more skills than in traditional classrooms. The teacher is a learner in the sense that she is continually assessing students’ understanding and taking onthespot decisions about whether to structure or guide the inquiry or encourage students to set off on their own. Although the Inquiry Maths model aims for participative activity in Dewey’s sense, it is also the case that participants adopt roles consciously and make them an object of reflection. The regulatory cards allow students to make suggestions about how the inquiry should proceed. This includes the activity they will embark upon at a particular stage of the inquiry and whether new knowledge is required to make progress. Importantly, the cards provide a mechanism for students to ask for an explanation from the teacher. At such a time, the inquiry classroom might take on the appearance of the traditional transfer of knowledge. However, as the 'transfer' is both meaningful in and relevant to an inquiry process partly directed by students, it is consistent with the teacher's democratic intent to give students control over their own learning. The role of the teacher in conveying knowledge is the most misunderstood point of all when in comes to views of inquiry. The teacher, as the representative of the discipline of mathematics, introduces a new concept or procedure when it overcomes an obstacle to inquiry. Even the leaders of Dewey’s school, Mayhew and Edwards report, changed their model in recognition of the advantage of subject specialists over general teachers: One of the reasons for this modification of the original plan was the difficulty of getting scientific facts presented that were facts and truths. It has been assumed that any phenomenon that interested a child was good enough, and that if he were aroused and made alert, that was all that could be expected. It is, however, just as necessary that what he gets should be truth and should not be subordinated to anything else. (pp. 3536) In this description, the teacher is the arbiter of what constitutes facts and truths. In the Inquiry Maths model, the teacher might also instruct students (although attempting to coconstruct knowledge as much as possible) when participants in the inquiry, including the teacher, identify the need. Andrew Blair January 2017 
PISA 2016 and 'enquirybased teaching'
posted 11 Dec 2016, 07:39 by Andrew Blair [ updated 11 Dec 2016, 22:17 ]
PISA 2016 and 'enquirybased teaching' in science There is good reason why this blog has never before discussed inquiry in science education. The inquiry processes in science and maths are completely different: science develops and adapts hypotheses based on experimental results; mathematical inquiry involves generalisation (based on pattern spotting or structural analysis) and proof by deductive reasoning. However, the PISA 2016 volume dedicated to science teaching, published this week, has been received as confirmation of the superiority of ‘teacherdirected’ over ‘enquirybased’ lessons. Traditional teaching practices, it is claimed, produce better test performance. The evidence seems compelling. As the report says, “In all but three education systems ... using teacherdirected instruction more frequently is associated with higher science achievement” (p. 65). However, the report also says that teacherdirected instruction is used much more frequently than enquiry. Might it be the higher frequency, rather than the superiority of the practice itself, which accounts for the association with test performance? Let’s look at teacherdirected practices first. PISA identified four characteristics of traditional teaching and asked students to report how often they featured in their lessons. I have grouped the four possible responses into two, combining ‘many lessons’ with ‘every lesson or almost every lesson’ and ‘some lessons’ with ‘never or almost never’. As Figure
II.2.14 (below) shows, the frequencies with which the four practices occur are mirrored exactly by their position in the ranking of 'scorepoint difference'. For example, 'the teacher explains scientific ideas' occurs most frequently and is associated with the highest positive scorepoint difference; 'a whole class discussion' occurs least frequently and is associated with the only negative scorepoint difference. The features that might be described exclusively as enquiry (that is, those linked to experimentation and investigation) occur, in the main, far less frequently than the other categories. Once again, however, there is a very close correspondence between frequency and scorepoint difference (see Figure II.2.20 below). The PISA report gives answers to the first question: teacherdirected techniques are less timeconsuming and easier to implement. In answer to the second question, a survey of European science and maths teachers showed a negative correlation between ‘systems restrictions’ and ‘routine use’ of inquirybased learning (IBL) – that is, the more restrictions, the lower the use. The restrictions included:
The message to be taken from PISA 2016 is that the teaching practices used most frequently in classes are associated with higher test results and those methods are used because of restrictions imposed by curricula and assessments. The PISA review of science teaching says very little about the relative merits of teaching practices and far more about how authorities define and measure learning. Andrew Blair December 11, 2016 
Inquiry and mixed attainment classes
posted 6 Nov 2016, 11:19 by Andrew Blair [ updated 7 May 2017, 04:56 ]
Inquiry and mixed attainment classes Mathematics is the most heavily setted subject in the secondary school curriculum. The most recent reliable figures published for England show over 80% of classes for students aged between 11 and 14 were set and, no doubt, the percentage was higher for older secondary students. Mike Ollerton characterises setting as "educational apartheid" in which the powerful exercise control over the powerless. Bottom set students are taught "repetitive, procedural, fragmented, disjointed, simplified mathematics" (Watson et al.); top set students are accelerated through the curriculum often to their detriment (see here for a selection of research papers). It is, therefore, welcome that more maths departments today are considering mixed attainment classes. However, an examination of the reason for the growth of interest suggests there remains cause for concern. The main reason is the mastery movement’s promotion of mixed attainment teaching. Supporters of mastery argue that students should move through the curriculum together, studying the same topics from the same materials. Yet, students are not treated equitably in the mastery classroom. Only when a topic has been 'mastered' do students get the opportunity to solve problems and reason deeply. Inevitably this twostage model of learning leads to a twotier classroom. Students who do not master a topic as quickly as their peers are denied access to the creative aspects of mathematics. As NRICH says here, mastery "may be insufficient for developing the potential of young mathematicians." The problem with the mastery approach is its insistence that solving and reasoning provide an opportunity to apply new knowledge; it rejects the notion that learning can occur in the process of solving or reasoning. Yet, it is when students are involved in a mathematical process that learning new knowledge becomes relevant and meaningful. When mastering a procedure is part of a wider aim to solve a problem or put forward a convincing argument, students are less likely to question the need to practise and more likely to become fluent in that procedure. Inquiry Maths was devised and developed in mixed attainment classrooms. Its design is ideally suited to promote learning at multiple levels:
Mixed attainment classes have their roots in social justice. Justice is not served by restricting one set of students to knowledge acquisition, while their peers move on to creative tasks. As Jerome Bruner says here, students should learn by both 'leaping' and 'plodding':
The current mastery classroom consigns some students to plodding. The rights of learners are being denied. The philosophy of inquiry, in contrast, promotes inclusiveness, cohesion and equity. Andrew Blair November 2016 
New on the website
posted 27 Jul 2016, 14:40 by Andrew Blair [ updated 27 Jul 2016, 14:41 ]

Introducing Inquiry Maths into a department
posted 2 Jul 2016, 02:09 by Andrew Blair [ updated 8 Jan 2017, 07:33 ]
Introducing Inquiry Maths into a department At an Inquiry Maths conference workshop recently, Rob Smith (@Mrrismithmaths) raised the issue of introducing inquiry into a secondary school department. Rob, the leader of the Maths Department at Northampton Academy (UK), wanted advice on the best way to promote Inquiry Maths with his team. Andrew Blair, who has led maths departments in three schools, replied: The approach I would take depends on the culture and practice of the department. If we assume that the department is like the majority described in Made to Measure, then we face a situation in which teachers do not expect students to solve multistep problems or reason mathematically on a regular, or even infrequent, basis. In this context, the introduction of Inquiry Maths is unlikely to succeed without support and training. It is not sufficient, for example, to write prompts into the schemes of learning as suggested activities. This approach underestimates the obstacles teachers face. Firstly, Inquiry Maths is not simply another resource that can be assimilated into existing practice; the full model might involve fundamental changes to a teacher's practice. Secondly, teachers in the UK state sector rarely have the time to engage with new ideas on their own. Hence, teachers will reject the suggested inquiry in favour of tasks that fit with their existing practice. I will now consider three cases based on the level of support for or opposition to Inquiry Maths within the department: (1) The majority of the department is interested in inquiry learning. In this case, I would require all members of the department to try out the same inquiry, with each colleague choosing one of their, for example, year 7 or 8 classes. This initiative would be the main professional learning to occur in the department over a half term, taking up the majority of time in departmental meetings. The departmental leader would organise sessions on trying out the inquiry, considering the level of inquiry appropriate to each class, discussing potential pathways that might arise, preparing resources for those pathways and, afterwards, evaluating the inquiry. In the next half term, the team could go through the same process or teachers might select their own inquiry to work on in smaller teams. Whatever approach is taken, however, departmental time must be given over to planning, implementing and reflecting. By the end of the first year, the leader might feel confident to include inquiries as required elements of the schemes of learning. (2) A minority of the department is interested in inquiry learning. In my experience, this is a more common situation. Perhaps two other teachers are prepared to embrace new ideas and are excited by the prospect of negotiating aspects of learning with their students. In this case, I would work with the interested teachers using a lesson study model. (Read Helen Hindle's report on an inquiry lesson study here.) We would observe each other running the same inquiry, focusing on the learning of identified students. Once again, time is a key issue. I would endeavour to arrange time off timetable to prepare the lesson study. Even without that, however, I have found that teachers interested in Inquiry Maths are those most committed to collaborative development and they are likely to give up their own time to improve practice. The aim would be for the two teachers to become advocates for inquiry within the department, spreading their enthusiasm to others. This phase might last for a year or less depending on how quickly others are drawn in. In the second year, the two advocates would lead their own lesson studies with four other colleagues and in the following year  that is, the third year  inquiries become required. (3) The members of the department are opposed to inquiry learning. It is difficult to envisage a situation in which you would find yourself leading a department that is opposed to inquiry if you wanted to introduce Inquiry Maths. If you are applying for departmental leadership posts, my advice is to consider other schools because this situation inevitably leads to frustration and acrimony. There are, however, two ways you might end up in this position. Firstly, you have been promoted internally and want to stay at the school. Hopefully, the relationships you have built up during your time in the department will lead others to trust you and you are able to identify one or two colleagues who are at least prepared to try out inquiry. Secondly, you are promised by the headteacher at interview that you will have the full support of the senior leaders to change practice in the maths department. This is a cynical ploy to use you as the battering ram against a recalcitrant department. Think carefully before accepting the post because, in my experience, the success of departmental leadership rests more on the relationships you have with classroom teachers than those with senior leaders. If the department thinks you are a stooge of the headteacher, then they will resist the introduction of Inquiry Maths (and any other initiative for that matter) even more. It is difficult to introduce Inquiry Maths into a department without the possibility of developing at least one advocate. Even if the department is supportive, the process involves cycles of planning, implementation and evaluation until, after a year, inquiry prompts become part of the schemes of learning. Of course, the special nature of inquiry learning means the process is never complete. Each inquiry starts with a unique set of students' questions and observations, has the potential to develop into new pathways and requires the teacher to decide each time on the nature of structure or guidance offered to the students. Eventually, discussion between colleagues about inquiry will become an everyday feature of the department's culture, but the leader must always be prepared to reinforce that process by giving over time in formal meetings to analyse the team's everdeeper understanding of inquiry processes. Andrew Blair July 2016 
Inquiry and problem solving
posted 2 Jan 2016, 10:34 by Unknown user [ updated 16 Feb 2017, 13:05 by Andrew Blair ]
Inquiry and problem solving The last post about problem solving featured a discussion with Dan Meyer (@ddmeyer). It centred on the notion of openness in maths classrooms with Dan arguing that openness is "a spectrum, not a switch." I was not convinced by this argument in relation to problem solving. Inquiry can be more or less open (see levels of inquiry), but problem solving only has the 'open middle'. While the the teacher poses the problem and knows the answer, the solving process can be carried out in different ways. Skills required by students relate to extracting relevant information from the problem, identifying similar problems that they have solved before, selecting methods, checking progress and verifying the solution. Inquiry has the potential for an open beginning, middle and end. The teacher will have an idea of different pathways that could arise, but they will not be exhaustive. Moreover, students' initial questions and findings might be novel. Key processes include questioning, noticing, conjecturing and proving. The distinction is reinforced in the National Curriculum in England. Reasoning through inquiry and problem solving make up two of the three separate aims of the curriculum: Unsurprisingly, the GCSE assessment objectives (AO), which are based on the National Curriculum, feature the same separation. AO2 covers reasoning, interpreting and communicating (which might be broadly classed as elements of inquiry) and AO3 lists problem solving steps (below). During the discussion, one teacher said “it all depends on how you define a problem.” If you define a problem in terms of the questions that appear in public examinations, then, as Mike Ollerton (@MichaelOllerton) contends, problems are “pseudoproblems which undermine mathematical thinking and all that is creative in maths." They have one closed answer that students are required to find. Yet, as another participant in the discussion remarked, a problem set in a classroom does not necessarily imply the answer is known. In problembased learning, for example, problems are openended, even if the starting point (the problem) is closed from the students' perspective. Geoff Wake (@geoffwake1), Associate Professor in Mathematics Education at the University of Nottingham, posted the following comment: "It's useful to think about the difference between solving a problem and problem solving." I took this to mean that ‘solving a problem’ is a restricted process with a closed beginning and end, but ‘problem solving’ is a creative process of applying generic skills, such as Polya’s heuristics, to an openended problem. The discussion echoes a distinction between two different types of problems that Polya himself identifies in How to Solve It. On the one hand, a problem to find aims to "to find a certain object” and, in order to achieve the aim, the solver must know the problem’s principal parts, the unknown, the data and the condition. On the other hand, a problem to prove aims to show conclusively that a certain clearly stated assertion is true or false. Its principal parts are the hypothesis and the conclusion of the theorem to be proved or disproved. We note that, while the problem to find could be “theoretical or practical, abstract or concrete, serious problems or mere puzzles,” the problem to prove lies exclusively in the domain of mathematics. It is a short step to linking a problem to find with the problem solving strand of the National Curriculum (including 'nonmathematical' contexts) and the problem to prove to the mathematical reasoning strand. However, the problem to prove is not synonymous with inquiry. In promoting students’ questions, exploration and conjectures, inquiry involves far more than a deductive proof of a theorem. While in Inquiry Maths lessons the teacher might help students formalise their ideas into a problem to prove, the starting point of inquiry (the prompt) cannot be likened to either of Polya’s problem types. Paradoxically, inquiry could involve what Polya describes as routine problems. These focus on the mechanical performance of operations and "can be solved either by substituting special data into a formerly solved general problem, or by following step by step, without any trace of originality, some wellworn conspicuous example." When students select a regulatory card to practise a procedure, the teacher might suggest answering routine problems, although restricting students exclusively to this type of problem is, according to Polya, “inexcusable" and, we might add, antithetical to the principles of inquiry. After this discussion, we must amend our characterisation of the relationship between inquiry and problem solving. We maintain the distinction – and even the separation – between classrooms in which problems to find (with their ‘open middles’) predominate and classrooms that emphasise inquiry processes linking exploration and deduction. However, problem solving can develop into inquiry when, for example, students change the conditions in the problem and study the relationship between the new solution and the old one. Nevertheless, I cannot conceive of a situation when or a reason why an open inquiry would be restricted to a problemsolving process. While inquiry skills enable students to attempt to solve problems, the converse is not true. Heuristics employed in problems to find would not, on their own, enable students to generate mathematical inquiry. Andrew Blair February 2017 
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