They are sending them because they are legally required to do so. There is nothing optional about it for most people. Parents have their jobs planned around t

They are sending them because they are legally required to do so. There is nothing optional about it for most people. Parents have their jobs planned around their kids being at school -- again, because it is a legal requirement that the kids be there. Suddenly withdrawing that -- going on indefinitely now -- is causing all sorts of strain, especially in households where the parents can't work from home.