I have cut my nurse visits to almost none using this poster and the concept of the 5B's.
It gives your kiddos a concrete reason for you saying no. Of course there are always emergencies that don't fit into the 5B's, but a lot of the time do they really need to go to the nurse or are they trying to get out of something.
***IF IT REALLY IS AN EMERGENCY, LET THEM GO***
Ice may cure everything, but it won't stop you from taking the Math Test!