For almost a year, schools have been reacting to the unprecedented circumstances that Covid-19 has caused. Most of the mitigation efforts thus far have been at the direction of state and local governments. Only recently have federal agencies given clear and substantial guidance on how to get students back into the classroom. Schools have largely fallen into three categories — in-person, remote, or a blended model that involves students doing some classwork at home and some at school. Some schools moved to increase their in-person learning and some have had to retrace their steps when positivity rates were too high, either in the school or in the larger community.