TOEFL is really challenging internet-based or paper-based standardized test that is managed by the private non-profit organization Educational Testing Service and requires serious preparation of the candidate. Whichever way of preparing for the test you choose the only thing that remains unchanged is your vocabulary. It is clear for all that in order to get a high score the candidate must have a large American English vocabulary that can cover a lot of narrowly specialized subjects that are rarely found in everyday communication. Therefore even for people who speak English well it is needed an additional preparation for the test.