A kindergarten teacher at my son's school trains service dogs. Once they're at an advanced level, she brings them to school with her, and the dog goes wherever her class goes...library, computer, art, chapel, etc. She usually has one chapel a year where she brings in a speaker and other trainers and their dogs, so the children in this school are all exposed to service animals, and understand that they aren't just pets, and can go places where their pets aren't allowed.