I think it is US accent for phonetics. Even I found letters like 'c', 'l', 'p' different from what we teach in India.
I almost got her confused with 'c'.
I myself did not know the correct pronunciation
however, the places where there is regional parity, I try to explain her that some people say like that, but we need to say this way......
Pls share some other good sites
Garima