My son is currently in a montessori school where he skipped kindergarten. His class is comprised of 1st and 2nd graders. His teacher has placed him w/the 2nd graders. It has been nice to get a taste of what it is like to skip grades. The work is not an issue. However, Peter would tell me the kids make fun of his age (5) and make fun of his "big writing" and that he has no friends. So in our case we have learned that it is not good socially to skip grades. He was so ecstatic when he turned 6 but then quickly realized well the other kids will be turning 7 then. He is the youngest in the class place w/the oldest kids.