International House San Isidro is the IDP IELTS Australia Test Centre in Argentina. In operation since 2008, we were awarded the IDP IELTS Australia Excellency Award for Growth in 2010/11. IELTS is the world’s proven English test. Over 1.5 million candidates take the test each year to start their journeys into international education and employment. IELTS is recognised by more than 6000 institutions in over 135 countries.