don't tell the school. if it ever gets around that it was your kid it's horrible. the pill plus frequent handwashing will take care of it. honestly, even the pill is optional (though see your dr; it doesn't hurt). I had them as a kid and when I learned what caused reinfection I was super cautious about not scratching and about washing my hands a lot and they went away, without me telling my parents. It was miserable though--scary, embarrassing, and uncomfortable.