Hi Batuk, maybe I'm not the best to advise you about the iBT, but all what I can tell you is to check the older posts in this forum about the exam, they are really helpful, then get a book to study and practice with, like the official guide of the ETS, or Barrons, or Thomson, Kaplan.... they are many and they are helpful as well....and then start to practice with the book you get...Also start to watch the English channels like the CNN, ANIMAL PLANET OR NATURAL GEOGRAPHIC,.. etc to get used to hear the English language.... If anyone else in this forum wants to add some more suggestions, they are sure welcome... Good Luck