So we are slightly at odds in my district. There is a push coming from some of the SNs to not necessarily send a student home right away for treatment for lice. The thought process is that the students probably had lice for an appreciable time before the discovery and that the social implications of being sent home has caused unnecessary violations in confidentiality - which it has - kids tell their parents that Jimmy and Sally got sent home after being checked for lice - the parents went as far as to post on facebook (and name names of the kids that had lice). So the new manner of thinking is to inform parents at the end of the day and send infested students back to class.
I just wanted to put it out there to get some feedback. I'll go into my own thoughts on this after hearing some of yours.