Van den Heuvel Panhuizen, Marja <br/><br/>
Improvement of didactical assessment by improvement of problems : an attempt with respect to porcentage 

 - 342-372 
 - 1994 Vol. 27, no. 4, dec. 
 = EDUCATIONAL STUDIES IN MATHEMATICS 
<br/><br/><label>Encabezamiento--Término de Indización: </label>APRENDIZAJE ENSEÑANZA MATEMATICA