I dont think that the child should be sent home as it can be very embarissing them. The parents should deffinately be made aware though! What every happened to the nit nurse?
We have a nit nurse at our childrens school. At the beginning of the school year a letter is sent home with each child informing the parents that unless they wrote in objecting to their child having regular examinations it would be assumed that they consented. We got a letter home after DD had had chicken pox and her poor scabby head was too sore to treat but at that point 14 out of 30 in her class had it and even the teacher was infested.