You have a good idea of what he or she can handle and what his or her behavior means. Give teenagers clear rules. Adolescents need to know what to expect and need your help in setting reasonable limits. They may resent or test these limits, but don't be afraid to insist on behavior that reflects your values. At the same time, respect your teenager's feelings and opinions by being consistent and willing to discuss the reasons for your decisions.
Teenagers gain strength and self-respect from clearly defined limits.
Your teenager is no longer a child and doesn't want to be treated like one. However, you may hear some strange, strong statements. Remember that it's normal for teenagers to test authority. Don't get defensive or begin a shouting match. Punishment usually doesn't help your teenager develop self-control.