Actually, degrees in ballroom are available in a number of universities in the USA. The istd also provides a teaching path that credits teachers for various levels. That said, teaching has nothing to do with degrees; the teachers who gave me the most were not always the most accredited nor the best dancers, but the best at making ME dance the best. Teaching quality is not about cost, proximity, or credits. To paraphrase an old joke: quality, price, convenience - pick two.