UND has a flight school campus at the Mesa-Gateway airport in Phoenix.

There are schools in Phoenix that cater to large numbers of foreign students; some of them such as ATCA are very professional. Others, such as Transpac, are not. In fact, the student level turned out by Transpac should be a criminal offense. (when the typical student fails a checkride three times for each certificate or rating...there's a BIG problem...so you want your signature on any of that?)