Hi everyone! I have great news.
Today was our big meeting (I started this thread in ...early May?) to discuss both girls.
The principal was awesome, was more concered about social and emotional well being than looking at test scores. She already knew that academically they could handle it.

DD5 will skip K and go to first.
DD9 will skip 4 and go to 5th.

Thanks everyone, for all of the advice! I did bring in the Iowa Acceleration, just as a point of focusing our conversation, which helped. I also had confidence in what I was asking for, thanks to this board and research.