LA TERRA
http://primaria.ieduca.caib.es/index.php?option=com_k2&view=item&id=110:la-terra-el-nostre-planeta&Itemid=119LES MÀQUINES
http://clic.xtec.cat/db/jclicApplet.jsp?project=http://clic.xtec.cat/projects/medinat4/jclic/invents4/invents4.jclic.zip&lang=ca&title=Coneixement+del+medi+natural+4t+de+prim%E0ria
