Adding it up : helping children learn mathematics 
Mathematics Learning Study Committee, Center for Education, Division of Behavioral and Social Sciences and Education, National Research Council ; Jeremy Kilpatrick, Jane Swafford, and Bradford Findell, editors 
 - Washington, DC  National Academies Press  ©2001 
 - xvii, 454 p. : ill. ; 27 cm 
<br/><br/><label>ISBN: </label>9780309069953 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching (Elementary)<br/>Mathematics--Study and teaching (Middle school)
<br/><br/><label>Dewey Class. No.: </label>372.7 KIL