Charlesthekingcavalier - many will want schools closed so they have more element of control over limiting close proximity to many and that fact they have some element of control over hand washing, how clean the environment is.
I work in a school, we've had no guidance, haven't been asked to take extra precautions over hand washing, there's no sanitiser. The children are lovely, but I suspect some go all day without washing hands so germs everywhere. As a member of staff I regularly get sneezed/coughed over, they'll be doing it to eachother I'm sure. We have cleaners in, but it's certainly not a deep clean - you see dirty/dry food on tables, finger print marks everywhere, dirty hall floors where the kids sit, They aren't going to keep distance from their friends etc etc.