oooh Calva, it sounds like you will have a great experience in training at a school for the Deaf in Puerto Rico. P.R. is supposed to be a beautiful island, and I know they speak Spanish (and English) there. I have never been to P.R. but back in East, I had many friends who were from P.R. It was interesting to learn something about their culture.
You can try the usual sites like
www.expedia.com,
www.travelocity.com,
www.cheaptickets.com, and so on to compare the prices. Good luck with your experience abroad, and please do let us know how it went!