International Association for the Evaluation of Educational Achievement (IEA)

"IEA is an international cooperative of national research institutions, government research agencies, scholars and analysts working to evaluate, understand and improve education worldwide." Select international research studies include:

• Progress in International Reading Literacy Study (PIRLS) "PIRLS provides internationally comparative data on how well children read by assessing students’ reading achievement. PIRLS collects considerable background information on how education systems provide educational opportunities to their students, as well as the factors that influence how students use these opportunities."
• Trends in International Mathematics and Science Study (TIMSS) "TIMSS has been measuring trends in mathematics and science achievement at the fourth and eighth grades since 1995. Conducted every four years at the fourth and eighth grades, TIMSS has a quasi-longitudinal design, with the fourth grade student cohort assessed four years later at the eighth grade.

IEA Data Repository
Downloadable data from IEA studies, an online analyzer tool, and a downloadable analyzer plug-in for SPSS.

Organisation for Economic Co-operation and Development (OECD)

Programme for International Student Assessment (PISA)
"PISA is an internationally standardised assessment that was jointly developed by participating economies and administered to 15-year-olds in schools.... Every three years, it assesses how far students near the end of compulsory education have acquired some of the knowledge and skills essential for full participation in society."

United Nations Educational, Scientific and Cultural Organization (UNESCO)

Institute for Statistics
"Internationally-comparable data on education, science, culture and communication."

The World Bank

EdStats - Education Statistics Database
"Comprehensive data and analysis source for key topics in education such as access, completion, learning, expenditures, and equity."