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In addition to the following questions about TIMSS, more FAQs about international assessments are available at:

Have there been changes in the countries participating in TIMSS?

Yes. Please follow this link to a table of all TIMSS participating countries and non-national education systems for each of the TIMSS years of administration.


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The survey consists of a few short questions and takes less than one minute to complete.
National Center for Education Statistics -
U.S. Department of Education