At least one college (ND maybe) has stated they are going to start the semester 2 weeks early and then transition to remote learning around November 1st and complete the semester prior to Thanksgiving. I have a feeling we will see a lot of K-12 schools do something similar.
At the college level this will give the students essentially 2 months off (December and January) during peak flu season. If they delay the second semester by a week or two, extending the semester later in May, and then do remote learning for a few weeks they will keep campus closed for the bulk of the flu season.
It would be a bigger challenge for K-12 but even having the whole moth of December off and then maybe remote learning in January would help if there is a second wave.