English Sound
Some sound. I especially like the Karaoke sing-a-long.
More About Pronunciation
Some sound. Real player needed. This site gives you lots of information about the sounds of American English including the IPA.
Ohio University
There are many links to information about pronunciation as well as informative exercises.
Phonetics Resources
Some sound. Recordings of the various sounds of English along with academic information about sounds and speech.
Pronunciation Activities
Some sound. This is a well-known ESL website, but it appears to be doing a lot of advertising.
Purdue University
A comprehensive list of all the materials available at Purdue University addressing ESL learning and skills.
Spoken American English Samples*
Sound. Here are some good examples of reduced speech.
Sunburst Media
Some sound. This is a fun site to explore, and maybe you will find something that appeals to you for practice. If you're not sure of how to benefit from what you find, your teacher can give you some guidance.