(((((WTBH)))))
I understand your fear. However, you can do this This is called standing up for yourself, and explaining how you have been stifled in doing your job the best way possible.
It has been stated above:
Try to keep your 'emotions' out of this, I know it is hard but you can do it.
Make a list of the points you want to make.
Keep it businesslike.
Call the superintendent by his right name. lol @ Tuffgirl.
Actually it sounds to me like you have thought this through and you know in your heart IT IS time for you to stand up for you.
Oh and one other thing, please do not forget to take us with you. We will fill up the superintendent's office in your mind. We are walking with you in spirit!!!
Love and hugs,