Hello,
I have always felt that there are always as many ways of pronouncing
words as there are people to pronounce them. With as many countries
speaking English as their native language or as a second language,
it is difficult to think of there being one "correct" pronunciation.
As long as the words are spoken clearly, and in a way that others
understand it, I don't think that we should expect our students to
speak as natives do.
Costadina