Any interested party can call to the attention of the SD that a child may be in need of Special Education.
HOWEVER, it is not in the SD's financial interest to identify, so usually the referring party is the parent. There are times lines that start rolling when you send the request by CERTIFIED mail. Do not do anything verbally that involves a timeline.
Whether you do the IEE before or after the SD evaluation. has advantages and disadvantges on both sides. I have meetings all day and do not have time to try to outline them at present. Maybe Sheila will have a link LOL
Good luck with your meeting. Stay calm and try to be detached. If you get angry or break down, they win because they will blame your child's problems on your parenting and/or personal "instability."
Martie