What are good sports for a 13 year old to lose weight?

Read some books about nutrition so you know how to eat right. When you are hungry, eat anything you want as long as you are sure it's food. When you are not hungry, stop eating. Your body will adjust itself to the best weight for your lifestyle without any further attention from you. If you want to lose fat, well, it takes oxygen to burn fat. That means heavy breathing, and that usually means jogging. Aerobic dance is good too. Dancers always have the best figures.