Live Mocha is a great site for learning languages -  36 different languages to be exact, including Turkish.  It is a great site for all levels.  Though I have only just begun to play around with the site it has a structured set of lessons to progressively help you improve your Turkish.  You can upgrade for more help, time with a tutor, more lessons and video downloads.  One great feature is that instruction can happen in your native language - not just English.  This provides better access for our Turkish friends trying to learn English.  Check it out.  It may be just the extra piece of the puzzle you need.  It may be just a good review.  Or it may be just the site your Turkish friends are looking for to learn English.  Let me know what you think. 

PS- click on the Live Mocha icon to go to their site.