Using investigations : an introduction to ways of working 

 - New York:  Cambridge university press,  1989. 
 - 80p.;  30cm 
<br/><br/><label>ISBN: </label>0521378742 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Primary Education
<br/><br/><label>Dewey Class. No.: </label>372.7  / USI