The Iowa Acceleration is really a review of whether or not acceleration is a good option for your child. It is not a test. There is a book that you purchase and then forms where you tally all the information. You must have testing already done for your child in order to use the form. One section of the testing takes into account IQ scores, achievement scores, it looks at social concerns, other siblings, size of child, sports, outside interests, emotional, behavior. I believe there were 6 categories. Based on the information it gives a score of excellent, good marginal or not recommended for grade acceleration. It is filled out in conjuntion with parents, school and test scores.
I don't think it would convince the school if they weren't somewhat on board already, but it did help us look at the big picture more. Fortunately for us the school did let us go ahead with the acceleration. The school kept my manual so maybe they plan on having it for future recommendations.