The dog is trained to lie beside the child in class.  It is obviously the teachers who need the education.  Would they deny a seeing eye-dog to a child with limited vision?  Please don't use the "special schools for the blind" excuse,  because there are different degrees of blindness.  Using the same argument the teachers use, the child with limited vision will never learn independence without that dog.  How does that differ from autism?  What we see are the teachers' reluctance to give up a tiny bit of control in their classrooms to the dog.  In reality, the class is in better hands with the dog than with the teacher.