A huge collection of listening exercises at TOEFL level. Enjoy them !

A collection of videos at a TOEFL level.

Discovery Channel 
History Channel
A collection of reading exercises at a TOEFL level.

Take the oficial TOEFL simulation!

Go to http://toeflpractice.ets.org/ in order to take the simulation.
Don't forget to report your score to your teacher.
To study phonetics with an accredited university:

The University of Iowa's Phonetics Lab