In Lord of the Flies What schools are the boys from?

Although we are not told what school the boys come from, we can presume that they had attended different schools because of the fact that, with the exception of the choir, the boys do not know each other before the events on the island. We can back this up as Piggy is initially given the job of "taking names", and because all of the boys feel the need to introduce themselves during the first meeting.