They only have to do 3 hours of schooling a day, do it early in the morning or in the evening.

School hollies here

Keep your kids home.
Tell hubby not to be a princess and step up to save lives.

Have you considered that by sending them to school you're then allowing the virus direct access to you & your husband? Maybe show him it will directly effect him & then maybe he'll decide he can find some time to take care if his kids.

Your husband should talk to his employer about reducing his work load or making his work hours more flexible. Could he put in a few hours on the weekend when you’re home, then he can supervise and assist the kid’s for a couple of hours through the week.
I’ve read that the kids aren’t expected to do full days like they would at school, just a couple of hours of school work a day is enough.

Definitely have a Chat to your school. If your husband can’t be flexible with hours he works eg. Do an hour or 2 in early morning before kids get up or at night after kids are in bed or while you’re home to supervise kids. Then I think it’s reasonable to send them to school. It puts them at risk if adequate supervision can’t be provided at home.

Talk to your school but I think you and your husband need to work together to make a schedule. The only way schools won’t close completely is if all parents who can avoid sending their children don’t send them. I know it’s tough but it’s for the greater good.