回复：孩子18岁, 怎么办?

(1) you must tell your child truth.
(2) Same question - can he changes to a public school? What school to go relies heavily on financial situation. If students can get financial assistances from school, great, if not, parents have to weigh it. Too many cases not only in white families even in Chinese families the kids can't go to private schools because of financial burden. Whether your kid can be successful not solely subject to what kind of school he is going.
(3) Whether his father pays him or not is a moral issue not a leagal issue. Let your child talk to his father and see. Good luck.