<p>Not many high school teachers have PhDs. I don’t know how much of an issue it would be, but something to look into is how much a PhD affects the salary they would pay you. I have heard that it can be difficult for older teachers with years of experience to get positions. Typical teacher contracts require teachers with years of experience to be paid quite a bit more, and schools can hire new teachers for far less. You might run into the same kind of problem; I really can’t say, but it’s worth checking out. Probably not a problem at private schools though and a high end private school might be happy to get someone who can teach math at high levels.</p>