Sounds like maybe the topic could be brought up in a teacher meeting? Perhaps come to some agreement among the teachers on how to address the dress..so to speak. I'm thinking perhaps the "violators" need to have a copy of the dress code sent home for parent's signature. Clearly, as a previous poster mentioned, the parents are purchasing clothing which doesn't jive with the rules. Or the kids are changing at school....I know that's what I did!
Slippers...who covers her girls now