Here is another site that claims to include about a basic vocabulary of about 2,000 words arranged in word lists by theme: http://www.dicts.info/vocabulary/index.php?l1=turkish&group=abstract
Not interactive and no pronunciation, but it could serve as a starting point for some lower level students, as well as a check for more advanced students who haven't studied English lexis in a systematic fashion. Both could use the lists as sources for their own flashcard sets in a site like http://quizlet.com. Quizlet lets users add lists of words to automatically create flashcards, so students could easily build up their own flashcards quite easily and quickly.
The same lists can be seen all on one page, with a 'mouse over' tooltip that lets you see the translation of a word when you move your mouse over it: See http://www.dicts.info/vocabulary/index3.php?l1=turkish