World History for someone completely new?

<p>Hi</p>

<p>I'm an international student and am planning to take SAT II Maths II and World History. With Maths I don't think it will be extremely difficult to get a top score (around 800) because I've already studied maths and built strong foundations, but with World History I haven't covered most of the content before ever. Could someone please tell me how much time will probably be needed for me to learn World History from scratch to a standard where I can get an 800 ish score?</p>

<p>Thanks</p>