Standard errors for scores of U.S. 15-year-old students at selected percentiles and at the mean on the Program for International Student Assessment (PISA) mathematics literacy assessment: 2003 and 2006

	2003		2006
	Cutpoint score	s.e.	Cutpoint score	s.e.
95th percentile	638	5.1	625	4.8
90th percentile	607	3.9	593	4.8
75th percentile	550	3.4	537	5.0
Mean	483	2.9	474	4.0
25th percentile	418	3.7	411	4.8
10th percentile	356	4.5	358	5.8
5th percentile	323	4.9	328	7.6
NOTE: The PISA mathematics framework was revised in 2003. Because of changes in the framework, it is not possible to compare mathematics learning outcomes from PISA 2000 with those from PISA 2003 and 2006. SOURCE: Organization for Economic Cooperation and Development (OECD). (2004). Learning for Tomorrow's World: First Results From PISA 2003, table 2.5c. Paris: Author; OECD. (2007). PISA 2006: Science Competencies for Tomorrow's World, Volume 2: Data, table 6.2c. Paris: Author.

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