https://www.sciencedaily.com/releases/2020/07/200709135545.htm > "Many children in the U.S. have not physically attended a school since early March because of the Covid-19 pandemic, and some have likened the period we're in now to an unusually long summer," said study author Allison Atteberry, an assistant professor at the University of Colorado -- Boulder. "Because our results highlight that achievement disparities disproportionately widen during the summer, this is deeply concerning." > "Teachers nationwide are likely wondering how different their classes will be in the coming fall," Atteberry said. "To the extent that student learning loss plays a larger-than-usual role this year, we would anticipate that teachers will encounter even greater variability in students' jumping-off points when they return in fall 2020."