As COVID is now hopefully being slowed down, schools are gradually reopening. Decisions on this matter differ by locations and parents and teachers are making personal decisions from place to place. Here are a couple of sources that may be helpful.
The Burbio (a tech company used by some schools) offers a tracker following school opening by location.
NEA maintains a tracker of COVID cases in schools (NPR description). The NEA site builds on the work initiated by teacher Alisha Morris.