Math teacher Doug Walters sits among empty desks as he takes part in a video conference with other teachers to prepare for at-home learning at Twentynine Palms Junior High School in Twentynine Palms, Calif., Aug. 18, 2020. A new study finds that students around the world suffered historic setbacks in reading during the pandemic and even deeper losses in math, with test score decreases so wide that the United States climbed in global rankings simply by falling behind less sharply. (AP Photo/Gregory Bull, File)
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