School for austitic kids?

My cousin is going to start aba (-pplird behavior analysis) school. They help austistic and other kids learn to behave in society. But they wont let my aunt see the school. They said its due to privacy issues. They won’t let her tour and see inside at all. Is that weird? Shes worried because she doesn’t even know how the classrooms look like. Is this normal and do these schools help? Please we really need more information on this and help.