Frequently Asked Questions
How can we be sure that countries administer the test in the same way?
The short answer is that procedures for the administration of the international assessments are standardized and independently verified.

Comparative Indicators of Education in the United States and Other G-20 Countries: 2015 is a comparison of the education system in the United States with those in the other Group of 20 (G-20) countries.
How much do students in the U.S. and around the world like school and like learning mathematics? These charts and tables show 4th-and 8th-grade student reports in countries participating in TIMSS 2011.
In 2012, U.S. 15-year-olds’ average score in mathematics literacy was below the OECD average and in reading and science literacy not measurably different from the OECD averages.
Percentage distribution of yearly earnings among employed adults in the United States by literacy proficiency level: 2012
Create your own analyses and explore the results from international studies... New gap analysis and regression analysis capabilities included
How can we be sure that countries administer the test in the same way?
The short answer is that procedures for the administration of the international assessments are standardized and independently verified.
NCES coordinates the participation of U.S. adults, students, teachers, principals, and schools in various international education studies. Learn More…