Stories revolving around children, teenagers and schools are hardly unusual. From Enidh Blyton to that Mormon with the glitter zombies young people have been going on adventures, with or without the lashings of ginger beer for decades.
There are a number of reasons for this: coming of age stories are popular, schools force together disparate characters in a natural fashion and (perhaps most importantly) they act as a universal touchstone. Not only have most of us gone to school, but almost all of us have been at school during our formative years.
In this context it is interesting how few roleplaying games allow child characters. It is almost as if roleplaying games tend to feature death or worse occurring to people or something.