J.D.
my son repeated Kindergarten 2x. He was not academically ready to move on. Age wise he was 5 but mentally was 1-2. Your son is only 5 so I don't think having him repeat kindergarten and going full day will really hurt him socially or emotionally. My son still needed just as much help in 1st grade. Just in the past 2 years is he doing really well. In fact, He will repeat again in high school. you should do what you feel is best for your child but since some kids don't start Kdg until they are 6, he will do just fine repeating. Its not like he will be way older than the other kids.