Middle school students sleep around 8 hours, each child’s sleep time will have individual differences, some children can meet normal needs with relatively little sleep time, and some children will need slightly longer to ensure that the child has a waking state throughout the day as the main standard. The sleep time will vary from age to age. The sleep time of infant stage may be 13-15 hours, preschool one about 1 hour, elementary school students to ensure about 10 hours of sleep, middle school students try to ensure about 8 hours of sleep. The best time to sleep is between 11pm and 6am to give your child adequate rest. Long periods of sleep deprivation can affect a child’s growth and development, and can even affect the normal development of the child’s organism. Children’s growth hormone is generally secreted more at night during sleep, especially when junior high school students enter puberty, growth hormone will affect the development of height if it is not secreted well. So try to make sure that your child can go to sleep before 11 pm and get up again at around 6 am, so that your child has sufficient rest. Middle school students wash their feet with warm water before going to bed, which is good for eliminating fatigue and for brain cells to turn from excitement to inhibition, thus promoting sleep, while drinking milk before going to bed can calm and tranquilize, replenish calcium and prevent osteoporosis.