Gather pictures and videos of the rabbit and it’s condition. Write a journal for a week or two of what you observe about the rabbit and the conditions it lives in and how it’s treated by others and how others react when you try to feed it etc and record the date and time of each reaction/observation you write. Also find out in your state the laws on voice recording conversations and consent to record a voice conversation and based upon that you could record conversations with the teacher about the rabbit or things you hear them say about it but don’t try to anger them because then they really may not allow you to see the bunny. Be on the down low about gathering all the evidence, then when you have enough gathered against them alert the police or a repeatable organization that protects animals against abuse. But make sure you have copies of everything you have as evidence before you submit it. In the meantime try to care best for the bunny as you can. People who choose to be cruel to animals are some of the worst people and it says a whole lot about who they really are deep down inside....