Mason, John,  1944- <br/><br/>
Developing thinking in algebra / 
John Mason, with Alan Graham and Sue Johnston-Wilder 
 - London :  The Open University,  2005 
 - xii, 324 p. :  ill. ;  25 cm. 
<br/><br/> 'The Open University in association with Paul Chapman Publishing.' 
<br/><br/>Includes bibliographical references (p. [316]-319) and index 
<br/><br/><label>ISBN: </label>1412911702 (hbk.)  RM496.30 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebra--Study and teaching (Elementary)--Great Britain<br/>Algebra--Study and teaching (Secondary)--Great Britain