PIRLS is the Progress in International Reading Literacy Study. This rigorous international survey compares the reading attainment and attitudes to reading of over 200,000 9- and 10-year-old children in 41 countries. It is the only international study to provide information on the reading habits of primary-aged children: the survey collects information not just on reading attainment, but also about children’s reading attitudes and habits, and whether and what they read for pleasure.