HANOVER, New Hampshire, July 20 (TNSres) -- Dartmouth College issued the following news release: * * * Economist Doug Staiger says academic delays in grades 3 through 8 require urgent action. * * * According to a new study, students in grades 3 through 8 across the United States lost as much as 20 weeks of academic progress during the 2020-2021 school year as a consequence of remote and hybrid learning at the height of the COVID-19 pandemic. "That gives you an idea, if you're half a year be  more