This is an interesting question! For your son to go to a good boarding school, it is certain that you will help him to prepare with tests, GPA, and other activities. For your question about buying house and going to the public school, there are some different approaches available. One thing for sure is that in order for you son to go to public school, you should establish 'a legal status' in USA possibly through different methods. It is not true that just buying a house guarantees your son to go to the public school. You might need to consult with professionals on this matter for further development. Prime Global.