15-year-old children are in adolescence, puberty is a period of accelerated physical growth and development, is the second growth spurt in life, so let children grow taller to pay attention to the following points: First, to ensure a balanced nutritional intake, daily to provide adequate intake of high-quality protein, such as eggs, milk, lean meat, etc.. Second, this age is heavy in school, should take time for children to participate in physical exercise 2-3 times a week, such as running, swimming, cycling and other aerobic exercise. Third, adolescence is prone to hypocalcemia, so vitamin D and calcium supplements should be given, and more outdoor activities in the sun.