As many states across the country have dealt with significant snowfall over the last two months, school districts have been forced to shut down for several days. School of Public Policy professor Dave Marcotte has conducted extensive research on the impact of snow days on student learning, and published an article in The Conversation about the work he has done with his colleagues. “Research shows that fewer school days do reduce student performance, especially for the more disadvantaged students. Evidence from previous winters also shows that more days in school do, in fact, improve achievement for American students overall, something that has been …