Staying awake during math class isn’t the only reason your child needs a good night’s sleep. Proper sleep is essential for kids’ health and well-being and plays a role in mood stability, learning ability and disease and injury prevention. But according to a study of nearly 200 fifth-graders, many aren’t getting the 10 to 11 hours they need each night. Most feel drowsy during the day two to four times a week and almost half admit having trouble waking in the morning on school days. The Journal of School Health reported that nearly half the kids argued about their bedtimes and almost one-third stayed up late without permission. The report suggests that a first step toward better sleep for your kids may be to remove computers and TVs from their bedrooms.