Fosnot, Catherine Twomey <br/><br/>
Young Mathematicians At Work  Constructing Number Sense, Addition and Subtraction 

 - Portsmouth, NH  Heinemann  2001 
 - xx 193 pages  Illustrated includes indexes 
<br/><br/><label>ISBN: </label>032500353 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics-study and teaching [Elementary]
<br/><br/><label>LC Class. No.: </label>QA 135.5  / .F6 2001