In addition to the following questions about TIMSS, more FAQs about international assessments are available at: http://nces.ed.gov/surveys/international/faqs.asp.

When are TIMSS data collected?

TIMSS operates on a 4-year cycle, with 1995 being the first year it was administered. Countries in the Northern Hemisphere conduct the assessment between April and June of the assessment year, while countries in the Southern Hemisphere conduct the assessment in October and November of the assessment year. In both hemispheres the assessment is conducted near the end of the school year.

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