It sounds like you're on the right track so far Lunamoth, I think if you read through threads on this forum, you'll find the general advice is to attempt to keep such meetings with school staff as positive as possible. Fact of the matter is that a lot of staff has little knowledge about the issues involved in GT education and negativity or an attacking demeanor often result in the staff member(s) getting defensive, dismissive, and they stop listening. It's easy to get frustrated at times, take a deep breath, think about if what you're about to say / do is just out of frustration or if it's likely to bring about the positive result you're looking to accomplish.