Junior high school students sleep around 8 hours, each child’s sleep time will have individual differences, some children can meet the normal needs of relatively little sleep, and some children need a slightly longer time to ensure that the child has a day of wakefulness as the main criterion. Sleeping time will vary at different ages. Infants may sleep 13-15 hours, preschoolers one hour or so, elementary school students ensure about 10 hours of sleep, and middle school students try to ensure about 8 hours of sleep. The best time to sleep is between 11 p.m. and 6 a.m. so that your child is well rested. A long period of sleep deprivation will make your child’s growth and development suffer, and may even affect your child’s normal organic development. A child’s growth hormone is usually secreted more during sleep at night, 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 after 11:00 p.m. and get up at about 6:00 a.m., so that your child can have sufficient rest. Junior high school students wash their feet with warm water before going to bed, is conducive to the elimination of fatigue, is conducive to the brain cells from excitation to inhibition, thus promoting sleep, while drinking milk before going to bed can be calming and tranquilizing, replenish calcium, prevent osteoporosis.