How could a child be out for 93 days, no school and how could you afford to pay $12,000- $44,000 on them.
Two observations here. First, don't assume that American education rules apply here. The young girl in the photo is probably not from the United States, so we don't know what rules apply for her education. Second, although this was a 93 day cruise, don't assume that everyone aboard had to be there for the whole cruise. It is quite common for people to join a leg of a world cruise and only spend a week or two on the ship.