Do you know what the next step would be in regards to not signing off on the GIEP - do I go back and forth with the school now for some time or straight to mediation? Is there a timeline? Is her current placement in jeopardy?
Hopefully others will chime in with recent experiences.
In the meanwhile, have you looked at your State laws and school policies? They may outline a process or protocol. The Wrightslaw website
, and the old post with a roundup of crowd-sourced advocacy info
may also provide some help or guidance.