The word TIMSS stands for Trend in Mathematics and Science Study. The achievements of fourth and eighth grades students can be collected in a period of time, which later can be used to compare with other students of different countries.
For more information, please visit the following websites:
http://nces.ed.gov/timss/
http://nces.ed.gov/timss/results07.asp
http://timss.bc.edu/
http://www.iea.nl/
http://www.edinformatics.com/timss/timss_intro.htm
