Recommended daily caloric requirement for an average teen

              The daily caloric intake for each person varies depending on three different categories; age, gender, and level of activity. Age matters because teens need to have more calories because these are the years that teens are growing. Gender plays an important role too because boys typically need to intake more calories than girls. Body mass. Activity level is vital because active teens intake more calories than non- active teens because they are burning more calories by working out.
              Naturally, as we get older we eat more, so the caloric intake for teens (ages 14 to 18) will be higher than a four to eight year old. Also, since boys need more calories than girls, their caloric intake will be higher too.
              When people do a sport or work out they are burning calories, so naturally they need to intake more calories to restore the calories they burned. Teens, ages 14 to 18, that work out two or three times a week are moderately active. For girls who are moderately active should consume 2,000 calories and males should consume 2,400 to 2,800 calories a day.

              Making sure that you eat enough calories for your suggested intake is important, but those calories need to be eaten in moderation. A teen can't just eat a major amount of calories full of meats because that would be unhealthy; everyone needs their share of starches, vegetables, fruit, meat, milk, and fats/ oils/ sweets.

http://www.weight-loss-center.net/calorie-needs-teens.html
http://www.exercise4weightloss.com/teen-calorie-intake.html
http://www.caloriecontentoffoods.com/the-food-pyramid/