Sir Karl Popper Schule is an integral part of a public school named Wiedner Gymanasium located in the 4th district of Vienna. It is a special branch with experimental status for highly-gifted pupils comprising grades 9 to 12. There are two classes per year with by 24 pupils in each, one science oriented (called “Realgymnasium“ in Austria), one humanities oriented (called “Gymnasium“). 188 pupils are attending this school at present, 405 have already graduated. Admittance is based on the results of internationally acknowledged test methods conducted by an external institution.