Fluency doesn't just happen with addition and subtraction;strategies and models for teaching the basic facts 

 - NewYork  Routridge  2020 
 - xx,284p.  24cm. 
<br/><br/><label>ISBN: </label>9 780367 151850 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Addition-study and teaching(elementary)
<br/><br/><label>LC Class. No.: </label> / Newton, Nicki