Task design in mathematics education :  an ICMI study 22 / 
Anne Watson, Minoru Ohtani,  editors. 
 - xviii, 339 pages :  illustrations ;  24 cm. 
<br/><br/><label>ISBN: </label>9783319096285  RM443.70 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching--Congresses.