Having said that, full grade acceleration is a pretty big step. Do you have to go in asking for it? Why not just say "We wanted this meeting so we hear your ideas for the best/easiest way to give her appropriate material". And let them think it's their idea.
I like Tallulah's approach for a first meeting - it's still all about building relationships - a book 'Getting to Yes' about negotiation might be helpful.
OTOH, when it comes time to actually put your cards on the table, it's important to ask for MORE than you want so that the school can save face a bit by turning down (or moving to the back burner) a few of the items that you care less about. Of couse this is risky.
Grinity
