You may have read this elsewhere in the forums, but in case you have not... when it comes to acceleration, there are excellent resources at the website of Acceleration Institute, which includes
- A Nation Deceived,
- A Nation Empowered,
- Iowa Acceleration Scale (IAS), reviewed on Hoagies Gifted Education Page here.

These may provide both research and a process, with which to approach the school.

What type of acceleration are you seeking? Whole grade acceleration? Single subject acceleration?