Although we are not skipping our son, now that he is in middle school, he has a lot of freedom in the classes he is taking. So he is subject accelerated 3 years in math. As the number of subjects he is accelerated in increases, he will be, de facto, accelerated. Rather than officially skip, I have figured that when he gets way ahead that he can take a year off. We have spoken of living abroad for a year or having him do an foreign exchange program or live near relatives who run a family business, giving DS a chance to apprentice in the business. He is excited about all those possibilities.