CLEMENTS, Douglas H. <br/><br/>
Learning and teaching early math   : the learning trajectories approach   xx, 468p; ill 
/ Douglas H. Clements and Julie Sarama 
 -  3rd 
 -  Routledge  2021 
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780367521974