My oldest entered K early and my 2 youngest will start K a year early this coming fall so 3 of 4 of mine have gone in early. Obviously I'm for it, the one child I have who did not go in early has been so bored he cried for a month each morning about having to go back to school. This fall he will spend half his day in a higher grade to make up for it. The full day isn't as bad as it sounds, and your child would not be the only one in class adjusting to full day. Most of the kids are not used to it and they keep them active. K is a fun year full of discovery and fun, I'm sure he'd rather do that than sit and relearn what he already knows!
