Ruthven, Kenneth <br/><br/>
The maths factory :  a resource book for teachers / 
Kenneth Ruthven. 
 - Cambridge:   Cambridge University Press,   1989.  
 - 125 p. :  ill. ;  30 cm. 
<br/><br/><label>ISBN: </label>0521339286 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching
<br/><br/><label>Dewey Class. No.: </label>510.71