Well, my experience has been that there are a lot of teachers who do whatever the hell they want regardless of what the principal says. Believe me, I spent enough time in principals' offices to know this personally. And there are a lot of principals who take their teachers' side no matter what, and any parent who actively advocates for their child in the school gets labeled a trouble maker and then the school digs in even harder to resist the parent.

Listen, nobody in the history of schools has worked harder than I have to advocate for a child in the school setting. Some people get lucky and find principals and teachers who are sympathetic and supportive. But most do not, and if one reads what support organizations for children who are learning disabled or gifted/learning disable have to say about it, my experience is far more common than the experience of having sympathetic and supportive principal and teachers.