when should i start studying..?

<p>lol AP science in US is like 10th~12th grade. Just study for an hour a day, and in 1 or 1.5 years and it will be hard for you not to get a 2350~2400.</p>

<p>thanks…already started…and randomly solved a practice test…before studying…i got like…a 2340…is that normal…:D…seriously…(HONEST)</p>