A large, air-conditioned bus draws up outside a school. Tourists, most from Europe and the US, disembark, cameras at the ready. Some have brought gifts: packages of pens and pencils. They distribute these to the children, who spontaneously begin singing and dancing. KATHLEEN SMITHERS, Lecturer, Charles Sturt University This scene and others like it play out in schools around the world. It’s called school tourism. It’s similar to orphanage tourism and so-called “slum” tourism, in which tourists visit orphanages or “slums” in poor countries to witness poverty and suffering. These sorts of tourism come with several ethical problems: photography of…