amiwrong

So, I've been an LPN since 2010. I started a few months ago being a one on one nurse with a student with special needs. I accompany him to school everyday, take care of his needs there, and ride the bus home with him. While there, I see the teacher interacting with the other special needs students. Over time, I noticed some disturbing trends. The teacher would withhold one students lunches because he "behaved better" while waiting to eat. She would hold his food for a long time (sometimes up to 2 hours after everyone had eaten) because he would sit quietly while waiting. He would often sign he wanted to eat and would even try to steal food off of his plate while waiting. This seemed horribly inappropriate to do to any child, especially a special needs child. My talks with the teachers went no where, so I reported it to a school official. She got in trouble, knew it was me, told me and everyone else in her class that "what happens in her class, stays in her class" And I had to put what I saw in writing. Now most of the teachers friends think I'm a nark, even though she was in the wrong. Did I overreact? Should I have just said nothing since the student was technically not my patient?