Working with these groups has radically changed my opinion on the merit of private school.
The private school kids, be them sixth, seventh, or eighth grade, are a pleasure to work with. They are attentive and polite, they really by gosh do encourage each other, they make truly insightful comments while climbing or during processing, they make references to Winston Churchill and physical laws.
The public school kids, on the other hand, have to be constantly told to pay attention; are full of such witticisms as "this is gay" and "hahaha, you fell"; trying to facilitate discussion with them is like pulling teeth; and an alarming number of the evaluation we ask them to fill out fail to display an adequate grasp of the concepts of sentence, subject, and predicate--much less provide any specific or helpful comments about what could be improved.
This is from an excellent post from a friend of mine. Go read the whole thing.