How Does Sleep Affect Success at School?

If your preschooler isn't getting the recommended 10-12 hours of total sleep daily, he should be. Research shows that even a one-hour deficit for children 3 and under might cause long-lasting behavioral and cognitive problems when they start elementary school. "Parents need to pay as much attention to sleep as they do to nutrition and other health issues," says Parents adviser Judith Owens, M.D., coauthor of "Take Charge of Your Child's Sleep". Here's how skimping on sleep affects preschool success.