<p>Barring new editions of the AP exam, how much do you think our modern knowledge of Calculus, Biology, and Economics has changed since last year or some other addition other than 2008?</p>
<p>Slight, fundementals may seldom change in these areasm, but we are not on the cutting-edge research, but for a test that administrator can easily change test rule and content.</p>
<p>But still, I am sure there will not be too much changing contents except re-formatting of the book</p>