Mathematics Explained for primary teachers 00-Haylock 4e-4037-Prelims.indd 1 11/06/2010 7:25:41 PM Education at SAGE SAGE is a leading international publisher of journals, books, and electronic media for academic, educational, and professional markets. Our education publishing includes: (cid:117)(cid:0) accessible and comprehensive texts for aspiring education professionals and practitioners looking to further their careers through continuing professional development (cid:117)(cid:0) inspirational advice and guidance for the classroom (cid:117)(cid:0) authoritative state of the art reference from the leading authors in the field Find out more at: www.sagepub.co.uk/education 00-Haylock 4e-4037-Prelims.indd 2 11/06/2010 7:25:41 PM Mathematics Explained for primary teachers 4th edition Derek Haylock 00-Haylock 4e-4037-Prelims.indd 3 11/06/2010 7:25:42 PM © Derek Haylock 2010 First edition published 1995 Second edition published 2001 Third edition published 2005, reprinted 2006, 2007, 2008, 2009 This fourth edition published 2010 Apart from any fair dealing for the purposes of research or private study, or criticism or review, as permitted under the Copyright, Designs and Patents Act, 1988, this publication may be reproduced, stored or transmitted in any form, or by any means, only with the prior permission in writing of the publishers, or in the case of reprographic reproduction, in accordance with the terms of licences issued by the Copyright Licensing Agency. 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SAGE Publications Ltd 1 Oliver’s Yard 55 City Road London EC1Y 1SP SAGE Publications Inc. 2455 Teller Road Thousand Oaks, California 91320 SAGE Publications India Pvt Ltd B 1/I 1 Mohan Cooperative Industrial Area Mathura Road New Delhi 110 044 SAGE Publications Asia-Pacific Pte Ltd 33 Pekin Street #02-01 Far East Square Singapore 048763 Library of Congress Control Number: 2010922538 British Library Cataloguing in Publication data A catalogue record for this book is available from the British Library ISBN 978-1-84860-196-3 ISBN 978-1-84860-197-0 (pbk) Typeset by C&M Digitals (P) Ltd, Chennai, India Printed and bound in Great Britain by Ashford Colour Press Ltd Printed on paper from sustainable resources 00-Haylock 4e-4037-Prelims.indd 4 11/06/2010 7:25:42 PM Contents About the author vii Acknowledgements viii The student workbook and the website ix Introduction xi SECTION A MATHEMATICAL UNDERSTANDING 1 1 Primary teachers’ insecurity about mathematics 3 2 Mathematics in the primary curriculum 12 3 Learning how to learn mathematics 24 SECTION B USING AND APPLYING MATHEMATICS 35 4 Key processes in mathematical reasoning 37 5 Modelling and problem solving 51 SECTION C NUMBER AND ALGEBRA 63 6 Number and place value 65 7 Addition and subtraction structures 83 8 Mental strategies for addition and subtraction 97 9 Written methods for addition and subtraction 109 00-Haylock 4e-4037-Prelims.indd 5 11/06/2010 7:25:42 PM vi Mathematics Explained for primary teachers 10 Multiplication and division structures 123 11 Mental strategies for multiplication and division 138 12 Written methods for multiplication and division 153 13 Remainders and rounding 164 14 Multiples, factors and primes 176 15 Squares, cubes and number shapes 187 16 Integers: positive and negative 198 17 Fractions and ratios 207 18 Calculations with decimals 219 19 Proportions and percentages 235 20 Algebra 248 21 Coordinates and linear relationships 265 SECTION D SHAPE, SPACE AND MEASURES 275 22 Measurement 277 23 Angle 295 24 Transformations and symmetry 303 25 Classifying shapes 315 26 Perimeter, area and volume 328 SECTION E STATISTICS 339 27 Handling data 341 28 Comparing sets of data 361 29 Probability 379 Answers to self-assessment questions 390 References 405 Index 411 00-Haylock 4e-4037-Prelims.indd 6 11/06/2010 7:25:43 PM About the Author Derek Haylock is an education consultant and author. He worked for over 30 years in teacher education, both initial and in-service, and was Co-Director of Primary Initial Teacher Training and responsible for the mathematics components of the primary pro- grammes at the University of East Anglia (UEA), Norwich. He has considerable practical experience of teaching and researching in primary classrooms. His work in mathematics education has taken him to Germany, Belgium, Lesotho, Kenya, Brunei and India. He now works as an education consultant for a number of organizations, including the Training and Development Agency for Schools. As well as his extensive publications in the field of education, he has written seven books of Christian drama for young people and a Christmas musical (published by Church House/National Society). Other books in education Haylock, D. (1991) Teaching Mathematics to Low Attainers 8–12. London: Sage Publications. Haylock, D. (2001) Numeracy for Teaching. London: Sage Publications. Haylock, D. and McDougall, D. (1999) Mathematics Every Elementary Teacher Should Know. Toronto: Trifolium Books. Haylock, D. and D’Eon, M. (1999) Helping Low Achievers Succeed at Mathematics. Toronto: Trifolium Books. Browne, A. and Haylock, D. (eds) (2004) Professional Issues for Primary Teachers. London: Sage Publications. Haylock, D. with Thangata, F. (2007) Key Concepts in Teaching Primary Mathematics. London: Sage Publications. Haylock, D. and Cockburn, A. (2008) Understanding Mathematics for Young Children: A Guide for Foundation Stage and Lower Primary Teachers, Fully Revised and Expanded Edition. London: Sage Publications. Haylock, D. with Manning, R. (2010) Student Workbook for Mathematics Explained for Primary Teachers. London: Sage Publications. 00-Haylock 4e-4037-Prelims.indd 7 11/06/2010 7:25:43 PM Acknowledgements My thanks and genuine appreciation are due to the many trainee teachers and primary school teachers with whom I have been privileged to work on initial training and in- service courses in teaching mathematics: for their willingness to get to grips with under- standing mathematics, for their patience with me as I have tried to find the best ways of explaining mathematical ideas to them, for their honesty in sharing their own insecuri- ties and uncertainties about the subject – and for thereby providing me with the material on which this book is based. I also acknowledge my indebtedness to Marianne Lagrange, Matthew Waters, Jeanette Graham and their colleagues at Sage Publications for their unflagging encouragement and professionalism. And, finally, my thanks are due to my wife, Christina, without whose support I could not have even contemplated writing a fourth edition of this book. 00-Haylock 4e-4037-Prelims.indd 8 11/06/2010 7:25:43 PM The Student Workbook and the Website To accompany this book there are two sources of supporting material. The first is the Student Workbook for Mathematics Explained for Primary Teachers (Haylock with Manning, 2010). This book, written with my colleague at UEA, Ralph Manning, has been produced specifically to accompany this fourth edition. For each of Chapters 6–29 of Mathematics Explained the workbook provides a set of tasks related to the mathematical content of that chapter, together with answers and further explanation. The tasks are of three kinds: checking understanding; using and applying; and learning and teaching. The second is the Mathematics Explained for Primary Teachers website (www. sagepub.co.uk/haylock). Included on this website are 45 of the 62 check-ups from my book, Numeracy for Teaching (Haylock, 2001). This material relates directly to the demands of the Numeracy Test that must be passed by trainee teachers in England as a prerequisite for Qualified Teacher Status. Where relevant I indicate towards the end of various chapters the Check-Ups available on the website that can be used by readers looking for further practice – but with a focus on the application of the mathematical knowledge and skills to the job of being a teacher. In addition, the website contains a comprehensive glossary of the key terms used in this fourth edition of Mathematics Explained for Primary Teachers. This combines all the glossaries at the ends of chapters into a single list in alphabetical order. Along with other relevant information, web links and assorted material, the website will also provide details of how the content of this book, chapter by chapter, links to primary school national curricula for England, Wales and Scotland and the level descrip- tions within each attainment target. 00-Haylock 4e-4037-Prelims.indd 9 11/06/2010 7:25:43 PM