EBBY, Caroline B.  Hulbert,  Elizabeth T  Broadhead, Rachel M. <br/><br/>
A focus on addition and subtraction   : bringing mathematics education research to the classroom   xii,224p;ill 
/ Caroline B. Ebby, Elizabeth T. Hulbert, and Rachel M. Broadhead 
 -  Routledge   2021 
<br/><br/> <br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780367462888