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offers data and documentation files from a number of completed IEA studies. These studies include CIVED, ICCS 2009, ICILS 2013, PIRLS (2001, 2006, 2011), prePIRLS 2011, the Reading Literacy Study (for countries that administered the test in both 1991 and 2001), TEDS-M, SITES (Module 1, 2006), TIMSS (1995, 1999, 2003, 2007, 2011, 2015), and TIMSS Advanced (1995, 2008).
PISA is an international study that was launched by the OECD in 1997. It aims to evaluate education systems worldwide every three years by assessing 15-year-olds' competencies in the key subjects: reading, mathematics and science.
The IEA Civic Education Study is the largest and most rigorous study of civic education ever conducted internationally. This research tested and surveyed nationally representative samples consisting of 90,000 14-year-old students in 28 countries, and 50,000 17- to 19-year-old students in 16 countries throughout 1999 and 2000.