Sleep

A girl in puberty needs 9 to 12 hours of sleep each night. It is best not to use computer screens close to bedtime because they make it harder to fall asleep.

Another thing a girl can do is to watch what she eats and drinks before bed. For example, some snacks contain chemicals that make it hard for people to fall asleep after eating them. Many sodas contain caffeine, which is not recommended close to bedtime, as caffeine can keep people from falling asleep or, if you do fall asleep, make your sleep less restful.

Also, if you feel tired during the day or have trouble concentrating on your schoolwork, you may need more restful sleep. Girls should do restful things before bed; avoid anything that excites your mind and body.