Ummm, at my school, we have an entire set of courses for people who consitantly swear directly in teacher's faces, engage in fights at school, have been caught doing drugs on school property, or are just general violent disruptions to the class. As of last week, 74 out of 704 students were in that particular set of courses.
There is a school nearby, about ten minutes away, where aggravated assault averages two counts a week. Last week was one of the outliers, with six.
Also, honestly, how often did you people who are now out of school see a student tell a teacher to "f*ck off" right to his face? There were two suspensions today because of that. As far as I can see, kids actually are getting worse. I am constantly disgusted by my peers' actions.
But that is not a valid sample size to make general observations about EVERYONE.
What would you call a valid sample size? The two schools, the one I go to, and the other, combined have nearly 1800 students. I don't have exact statistics for both, but 10% still seems to be awfully high.