The following are web sites that have material on articulatory phonetics
and the International Phonetic Alphabet.
The first link is the website for the textbook for this class. The links to Chapter 2 have material on phonetics. The second link is the set of website links that the textbook suggests looking at. Some of these go to lecture notes that cover the material we're looking at in class.

Contemporary Linguistics website
More Phonetics Links
This is the official website of the International Phonetic Association, which maintains the IPA. It has sound files of each of the sounds there is an IPA symbol for.

The International Phonetic Association homepage
This is a site designed for adult learners of English. It has drawings of how each English phone is articulated, and a sound file associated with each:

http://www.soundsofenglish.org
This web page gives you samples of transcriptions in the IPA:

IPA Trainer
A chart of the IPA symbols. Clicking on any symbol plays a sound file that produces the corresponding phone. (From Peter Ladefoged's textbook.)

IPA chart and sounds
Wierd.

Observing Your Articulators
Let's you fix some parameters for articulating a sound, and then shows you both what those articulations would look and what the IPA symbol for it is.

Interactive Sagittal Section
This has a very useful "drill" which helps you learn the articulatory properties of sounds:

http://www.umanitoba.ca/faculties/arts/linguistics/russell/138/practice/d2intro.htm
An IPA recognition tester. (Some of the symbols this will drill you on we haven't reviewed in this class.)

http://www.ic.arizona.edu/~lsp/IPA/IPAGame/IPAGame2.html
A database of X-Rays of the speech organs at work.

http://psyc.queensu.ca/~munhallk/05_database.htm
This is a video clip of vocal folds vibrating during voicing:

http://www.humnet.ucla.edu/humnet/linguistics/faciliti/demos/vocalfolds/vocalfolds.htm