With the children starting back at school or starting school altogether for our Prepies, they need to have their full energy for the business of learning. Over the holidays hey may have been able to stay up later at night, but they do need to go to sleep earlier, so they are fully rejuvenated for school the next day. The National Sleep Foundation says our Prepies who are 5 years old need between 11 to 13 hours of sleep a night. Children between 6 and 13 years of age need between 9 to 11 hours sleep each night. If children are not getting this much sleep each night it is going to affect their learning at school.