There are some foreign international schools in Portugal, specially in Lisbon and Porto areas, and also in the Algarve region. These places have a large number of settled foreign families from high income countries. In general, they have good reputation. Aljezur International School is a progressive English speaking international secondary school, with an excellent exam result history, and VVIS International School Algarve reports that it has obtained a 100% academic success rate for the last four years for first attempmt IGCSE examinations. Other private schools have obtained world-renowned status, including schools such as the Carlucci American International School of Lisbon (CAISL), VVIS International School Algarve, St Julian's School, Oeiras International School, St Dominic's International School, Prime School Trilingual International School and Vilamoura International School. The latest addition to this set, is the Greenes Tutorial College, opening in September 2017, offering a tutorial method of learning. Greene's accepts students from all over the world to study a wide range of A level subjects and for the Greene's Geoscience Diploma. There is one international school in Madeira Island Portugal. Escola da APEL is a non profit private Catholic School, founded 40 years ago in Funchal, with an excellent reputation. It offers the International Bacallaureate Diploma Programme and the Portuguese regular curriculum. Education has been a subject of controversy in Portugal due to a number of erratic policies and the state of flux it has experienced by several long periods, particularly between the carnation revolution coup of 1974 to the Bologna process of 2007. There has been also concerns related to the large dropout rates (mostly in the secondary and higher education systems), and the high multi generational functional illiteracy (48% functional illiterates in Portugal, among the adult population; all over U.S.A. 30 million (14% of adults) are functionally illiterate) and illiteracy rates (7.5% = ~ 800,000 illiterates) - a quite mediocre statistical record when compared with other developed countries of Europe, North America and Eastern Asia. The failure of many private universities and other higher education institutions in providing higher education to students due to generalized lack of quality and rigour has also been a major problem - for several years those institutions were awarding degrees to thousands of people who were spread into the economically active population. Some higher education institutions, in particular from the private and polytechnic sector, have been regarded as true diploma mills.