I teach preschool, and previously taught 1st grade, and I've seen this situation several times.  There is not one "right" answer, every child is different.  I have taught children who were ready, and went to private kindergartens, and then went on to first grade in public school the year that they would otherwise have been in public kindergarten.  In my private preschool, I teach the children what they are ready for - so my kiddos that miss the cut off date like your daughter get to stay with me in "preschool", but work on kindergarten level work if that is what they are ready for.  They get the benefit of the social interaction, as well as academics based on their needs.  Perhaps you could find a similar situation for your child?  Many former school teachers operate home child cares, and might have the education background to really help her, and I have heard the military child cares are wonderful.  I'd recommend looking for someone who can meet your child's needs now, and then see what the schools think is appropriate next year.  It is possible they'll have her skip kindergarten and go right into 1st grade (my son did, and for him it was the right decision) or they may keep her in kindergarten.  Either way, she gets both the social time and educational stimulation she's ready for, both this year, and next.