I started a thread about this:
https://www.dcurbanmom.com/jforum/posts/list/892916.page
Basically, some are closing because of virus concerns or staffing concerns, some are remaining open, and some have cancelled some classes (mostly the little kids classes for toddlers/2 year olds) but are keeping the older classes running. They are not required to follow FCPS and, as far as I know, are regulated more like day cares than like schools.