Just in time for the start of the new school year, America’s public-education system has received a damning report card. The latest results of the National Assessment of Educational Progress reveal historically large drops in math and reading scores for US public-school students. The findings are an indictment of school closures that went on for far too long, pushed by teachers unions and some of their political allies. They also show why recovering the ground students have lost is a national emergency. The NAEP compared the performance of 9-year-olds who took the assessment in 2022 with data from early 2020, before the start of pandemic school closures.