Only reason I bring it up is it would give the principal an excuse to ignore your letter.
It's a fine, hard-hitting letter and should make the principal shake in his boots.
It will be hard for the administration to totally ignore the letter since it was read on the local news channel radio station this afternoon.
Funny thing though, my daughter's study sheet for science class had, at my count, three grammatical errors that changed the meaning of the questions she was being asked. Something that Principal should be proud of...