The IEA Data Repository

Our data repository 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). Data from ongoing studies are added to our repository after the release of the respective international databases.

Please click here to log in and gain access to our data.

Software for IEA data

We currently offer two software applications that will allow you to analyze, view, and explore data from our studies. They are the IDB Analyzer and the Data Visualizer. You can also access data through the National Center for Education Statistics (NCES) International Data Explorer. Select the software you prefer and obtain the data you need.

IEA IDB Analyzer

Used to combine and analyze data from all IEA’s large-scale assessments, as well as analyze data from most major large-scale assessment surveys, including those from the US National Assessment of Educational Progress (NAEP), and those conducted by the Organisation for Economic Co-operation and Development (OECD).

You can find video tutorials on how to use this software here.

Data Visualizer

Enables you to visualize trends in TIMSS and PIRLS data over time. Also lets you visualize data in the form of graphs and world or regional maps.

NCES International Data Explorer

Developed by the NCES, this software lets you explore TIMSS and PIRLS data.

Aggregated and complementary data

XTXS: An international cross-time, cross-system database for educational researchers

XTXS is a database that offers free access to education-related data sets, complementing the IEA Data Repository and databases maintained by other research organizations. Its main goal is to help researchers overcome the challenges they face when working with cross-national data, especially in terms of facilitating the download of aggregated and merged data files.

The database compiles information from a large number of sources, including major international large-scale assessments such as the Progress in International Reading Literacy Study (PIRLS), the Trends in International Mathematics and Science Study (TIMSS), the Programme for International Student Assessment (PISA), the Programme for the International Assessment of Adult Competencies (PIAAC), and the Adult Literacy and Lifeskills (ALL) survey. Other sources include databases such as UNESCO’s Data Centre and the World Bank’s EdStats, and compilations such as The Condition of Education and the Digest of Education Statistics, both disseminated by NCES, and Education at a Glance, published by the OECD.

XTXS offers data on a wide array of topic areas, including, but not limited to, outcomes of education, school contexts, characteristics of students and education systems, as well as economic, social, geographic, and political indicators relevant to teaching and learning. It provides information across time (from 1970 up to the present), across space (from 232 education systems worldwide), and at various levels (e.g., country-level).

Data files are available in two formats so as to meet the specific needs of the individual user. The first format is wide (years nested in columns/variables), and the second format is long (years nested in rows/countries). The available files can be used in conjunction with common statistical software packages such as SAS, Stata, and SPSS.

Click here to get access to XTXS database.


If you want to contact one of our experts, please email secretariat [at] (subject: Seeking%20contact%20with%20IEA%20data%20expert)