Forty-one countries and economies participated in the PISA 2003 assessment.

	Australia		Austria		Belgium
	Brazil *		Canada		Czech Republic
	Denmark		Finland		France
	Germany		Greece		Hong Kong-China *
	Hungary		Iceland		Indonesia *
	Ireland		Italy		Japan
	Korea		Latvia *		Liechtenstein
	Luxembourg		Macao-China *		Mexico
	The Netherlands		New Zealand		Norway
	Poland		Portugal		Russian Federation *
	Serbia and Montenegro*		Slovak Republic		Spain
	Sweden		Switzerland		Thailand *
	Tunisia *		Turkey		United Kingdom
	United States		Uruguay *
The above countries were members of the OECD at the time of assessment, except those marked with an asterisk (*).