Duckworth, Eleanor Ruth <br/><br/>
Either we're too early and they can't learn it or we're too late and they know it already : the dilemma of 'applying Piaget' 

 - 297-311 
 - 1979 Vol. 49, no. 3, aug. 
 = HARVARD EDUCATIONAL REVIEW 
<br/><br/><label>Encabezamiento--Término de Indización: </label>APRENDIZAJE NIÑOS PIAGET, JEAN, 1896-1980 PSICOLOGIA EDUCATIVA