Our daughter was accelerated mid year last Spring. Beforehand I Googled "Iowa Acceleration Manual" and found a copy to print out on some website for free. I filled it out ahead of time to see what score we would get. We paid our psychologist to come to the meeting (10 people or so!)so we would have someone on our side. It was comforting to have the good score and a knowledgeable person in the face of all those educators!
Good luck!
PS - DD10 is doing great in middle school. She went to her first dance and led a conga line!!!!!