Claim: The Hauptschule earned more than 500 PISA score points for both "low" and "very low" social classes.
Evidence: According to the PISA study, competency was linked to social class. Gymnasium (German pronunciation: [ɡʏmˈnaːzi̯ʊm; German plural: Gymnasien), in the German education system, is the most advanced of the three types of German secondary schools, the others being Realschule and Hauptschule.