I recently saw a photo posted on Facebook that has been haunting me since I first saw it.  It’s a picture of an elementary school class practicing for an upcoming chorale concert.  Everyone is sitting together on the bleachers of an auditorium, except for one student who is sitting all by himself, a few feet away from his peers.   He is not sitting in the bleachers because he is sitting in his wheelchair with his head bowed down low, as if he were ashamed. His teacher did not have the...