Princeton Review Biology E/M's correlation to the real test?

<p>Hello,</p>

<p>I was wondering: how accurately does the PR's Biology E/M Test (the first one) represent the real CB test?</p>

<p>I have gotten a 770 on the Sparknotes Test # 2 and 760 on the PR's Test #1.
For those of you who have tried both, do you mind sharing your experiences?</p>

<p>Also, as for the World History Subject Test, how hard is it?
I have gotten a 5 on the AP World History Exam. Would that suffice as long as I refresh myself on the material? Does it deal with more detailed things?</p>

<p>Thank you.</p>