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The Trends in International Mathematics and Science Study (TIMSS) provides reliable and timely data on the mathematics and science achievement of U.S. students compared to that of students in other countries. TIMSS data have been collected from students at grades 4 and 8 since 1995 every 4 years, generally. In addition, TIMSS Advanced measures advanced mathematics and physics achievement in the final year of secondary school across countries. TIMSS Advanced data have been collected internationally three times, in 1995, 2008 and 2015. The United States participated in TIMSS Advanced in 1995 and 2015. TIMSS is sponsored by the International Association for the Evaluation of Educational Achievement (IEA) and managed in the United States by the National Center for Education Statistics (NCES), part of the U.S. Department of Education.

The most recent TIMSS data collection was in 2015 and included students in grades 4, 8 and 12. Click for further information about TIMSS 2015 and TIMSS Advanced 2015. In TIMSS 2015, more than 60 countries and other education systems, including the United States, participated in TIMSS at grades 4 and 8, and 9 participated in TIMSS Advanced. Results from the 2015 TIMSS and TIMSS Advanced were released on November 29th, and can be viewed on the Results page.

Examples of all TIMSS assessment questions can be found here and TIMSS questionnaires can be downloaded from here. For other information or questions, see the Frequently Asked Questions (FAQs) here or you can use the "Contact Us" button at the top of the page.

The TIMSS International Data Explorer (IDE) is available for users to create their own tables and charts, and perform statistical tests with data from all years of TIMSS. The TIMSS IDE is modeled after the NAEP Data Explorer and functions the same way. The TIMSS IDE can be accessed here.

More information about TIMSS and related resources, including the TIMSS International reports, TIMSS assessment frameworks, and international data files, are available at the TIMSS International site.

International Data Explorer You can explore the TIMSS data directly through NCES's online data tool — the International Data Explorer (IDE)

Explore Your KnowledgeTest your mathematics and science knowledge by completing TIMSS items in the Dare to Compare challenge!

highlight icon of a check markNews and Highlights

TIMSS and TIMSS Advanced 2015 Results Now Available!

Data Training

Opportunities to learn how to use data from TIMSS.

Data Snapshot

TIMSS (International) 2011 Assessment<br />

4th GRADE SCIENCE SCORE<br /><br />
U.S. AVG. :  544<br />
TIMSS Scale AVG. :  500
TIMSS (International) 2011 Assessment

U.S. AVG. : 544
TIMSS Scale AVG. : 500

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