15 years old should be a junior high school student! Considering that the girl is in the development stage, you can let her practice the "basic skills" first, that is, some "stretching" actions such as kicking and crossing her legs, because "body" training can make the developing child have a good body shape and cultivate a distinctive temperament. At least you won't worry that the child will "hunchback" in the future; I have been studying ballroom dancing for 4 years, so I suggest you consider other dances when she is 16 years old, that is, after a year of physical training, because this will not only hurt her health, but also help her to cultivate dance in the future! Her dance teacher will find that her temperament and figure are very good; Here, I don't agree with the child's "backbone" figure. We should arrange our diet reasonably and don't blindly pursue "thinness"! This sometimes backfires! If your child is lively or enthusiastic, I suggest her to dance "national dance"; If your child is introverted, choose "China Dance" or ballet; If your child likes hip hop or has a strong sense of rhythm, "hip hop" is undoubtedly her best choice! The above is my personal opinion, I hope it will help you!