Due to skeletal development, adolescents are in discomfort when they are forced to sit still for long periods of time. Also, since their organs grow at different rates sitting for long periods often does not allow enough oxygen to get to the brain. This affects adolescents' ability to concentrate for long periods of time while sitting still. It is imperative that parents and teachers set rules and limitations. Adolescents like to test them but they really appreciate having them set.
Parents can relax on issues such as hair, but tighten on issues such as curfew.