Countries
Thirty-five countries from around the world participated in PIRLS 2001, and forty-one countries participated in PIRLS 2006. Fifty-three countries are planning to participate in PIRLS 2011.
| Countries |
| Botswana | | | o |
| Egypt | | | o |
| Morocco | o | o | o |
| Nigeria | | | o |
| South Africa | | o | o |
| Azerbaijan | | | o |
| Bahrain | | | o |
| Chinese Taipei | | o | o |
| Hong Kong (SAR) | o | o | o |
| Indonesia | | o | o |
| Iran | o | o | o |
| Israel | o | o | o |
| Kazakhstan, Republic of | | | o |
| Kuwait | o | o | o |
| Mongolia | | | o |
| Oman | | | o |
| Qatar | | o | o |
| Singapore | o | o | o |
| Turkey | o | | |
| United Arab Emirates | | | o |
| Armenia | | | o |
| Austria | | o | o |
| Belgium (Flemish) | | o | |
| Belgium (French) | | o | |
| Bulgaria | o | o | o |
| Croatia | | | o |
| Cyprus | o | | |
| Czech Republic | o | | o |
| Denmark | | o | o |
| England | o | o | o |
| Finland | | | o |
| France | o | o | o |
| Georgia | | o | o |
| Germany | o | o | o |
| Greece | o | | |
| Hungary | o | o | o |
| Iceland | o | o | |
| Italy | o | o | o |
| Latvia | o | o | o |
| Lithuania | o | o | o |
| Luxembourg | | o | o |
| Macedonia, Republic of | o | o | |
| Malta | | | o |
| Moldova | o | o | |
| Netherlands | o | o | o |
| Norway | o | o | o |
| Poland | | o | o |
| Romania | o | o | o |
| Russian Federation | o | o | o |
| Serbia, Republic of | | | o |
| Scotland | o | o | o |
| Slovak Republic | o | o | o |
| Slovenia | o | o | o |
| Spain | | o | o |
| Sweden | o | o | o |
| Ukraine | | | o |
| Canada1 | o | o | o |
| Trinidad and Tobago | | o | o |
| United States | o | o | o |
| Belize | o | | |
| Honduras | | | o |
| Argentina | o | | |
| Colombia | o | | o |
| Australia | | | o |
| New Zealand | o | o | o |
o = participating country
1 In 2001 Canada was represented by the provinces of Ontario and Quebec, only. In 2006 Canada participated as 5 separate jurisdictions: Alberta, British Columbia, Nova Scotia, Ontario, and Quebec.
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