I agree with the others - fill out an IAS form. It really helped our local school overcome the fears of a grade skip by giving them an objective way to measure whether the student would be a good candidate for skipping.

Also, try to stay on the good side of the prinicipal, because you will want help selecting a teacher who wants your child and who is also good at differentiation (many kids who have gotten grade skips still need additional differentiation).

good luck!