What this does is put the teacher on notice that his behavior has been made public. That should stop any unwanted advances. It also puts the Principal on notice that the School Board is now involved in his decision process. I believe they will all back away from their position. When it comes to your child's safety you must be aggressive. Write your letter of explanation and send it to the Principal, Teacher, and School Board members Registered, return receipt requested. This will definitely put “creepy” teacher on notice that his behavior has been made public.
A well stated good strategy, ladyL.
Caveat: It is really best to have a good lawyer draft the letter(s) to avoid claims of defamation...