S.P.
Hmmm...well, my rule w/my kids is you have to have a fever or be throwing up to stay home. Otherwise they go. I don't neccisarily take them to the dr. tho. If I'm reading you right you just threaten that so they won't play sick right? So if they do stay home they must be sick enough to go to the dr. I wouldn't just take them for a fever or throwing up for 1 day either. But that's not the question. I would tell him your rules and if he can't agree w/them then maybe he should just get them on the weekends. Tell him that's the schools rule too, well, at least my school. Fever or throwing up they don't want them there, otherwise tell him to send them. I wouldn'tmake him take them to the dr. tho. And be nice about it no need to start an argument over this yet. See what he says and does and take it from there. Oh, and he should be telling you if the kids had to stay home and why. That's only right.
Good luck!
S.