Full context:   The Progress in International Reading Literacy Study (PIRLS) is an international study of reading (comprehension) achievement in fourth graders. It is designed to measure children's reading literacy achievement, to provide a baseline for future studies of trends in achievement, and to gather information about children's home and school experiences in learning to read. The 2021 PIRLS report shows the 4th-grade reading achievement by country in two categories (literary and informational). The ten countries with the highest overall reading average (with scores) are Singapore (587), Ireland (577), Hong Kong SAR (573), Russian Federation (567), Northern Ireland (566), England (UK) (558), Croatia (557), Lithuania (552), Finland (549), and Poland (549). Some others are the United States (548) 11th and Australia (548) 13th. Among the benchmarking participants are the four Canadian provinces of Alberta (539), British Columbia (535), Newfoundland and Labrador (523), and Quebec (551). The largest province, Ontario, was notably absent.