4. Pronunciation (1) - North American English + Video/Audio Exercises

If you really want to think about what you have to do in your mouth during speaking. Your tongue, your vocal cords, your lips, your teeth, it´s your voice.

http://www.uiowa.edu/~acadtech/phonetics/#

(University of Iowa)

It´s one of the best scientific pronunciation links ever.
Take your time, do exercises and improve your "English".

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You think you know all about Vowel Charts, or it doesn´t really matter ? Here your are:

http://www.paulmeier.com/ipa/vowels.html

(Interactive with audio, move your mouse cursor above the symbols and "click")

My favorite pronunciation site:

http://international.ouc.bc.ca/pronunciation/
(Useful videos, audio and interactive exercises)

Vowel Map with Audio

http://www.utexas.edu/courses/linguistics/resources/phonetics/vowelmap/index.html