Are your kids sick or just sick of school?
My son today informed me he's not feeling great. First... My kids are not complainers.. But I also know he's not sick. Instead of making him feel stuck or not listened to (in case he IS sick).. I try to commiserate w him. I told him I wasn't feeling great either and that it being the day back after three days off and it's foggy out .. I get it.
I always tell him when he's like this to go and see and if he can't make it after lunch to call me. And rarely he has.
The thing is.. Unless my kids are obviously sick... They won't complain.