@D.Hutchinson I don't know about American teenagers, who seem to be so free that they can still cook for themselves every day and afford a part-time paid job while studying at school. So maybe they can afford to surf internet often. In my country, teenagers are very busy; it's impossible for them to have a part-time job while studying. When I was a teenager, we had an overwhelming amount of schoolwork--homework to do and exams to prepare for.