More and more parents are holding their kids back from starting kindergarten to give them an advantage later on. By delaying their entry to school, these kids wind up being a little older than their fellow students. The strategy, known as redshirting, is used for a variety of reasons- for instance, to wait until a child is more emotionally mature or to give them a competitive edge in academics or sports. And some studies have shown that holding kids back a year eventually improves their test scores. But there are drawbacks too- having students of varying ages can make it difficult for teachers to get through the required material. As if kindergarten teachers don’t have a hard enough job already!