A Florida high school required parents' permission for students to watch Disney's 'Tangled,' prompting some to say local education laws are 'out of control'
The way parents can stop this is by asking the school whether they had a license from Disney to show the movie.
The permission slips are just proof they showed the movie to a large group of people (most likely without a license, because what school has a budget for that?)
This isn't actually public exhibition because members of the public in general cannot attend. This is an educational purposes deal and is perfectly fine.