<p>A 5 on the BC Calculus test is MUCH easier to obtain than a 7 on the IB HL Math test.</p>
<p>In fact, it may be easier to obtain a 5 on the AB BC Calculus test than a 7 on the IB standard level Math test. Ask my daughter. She got a 6 on IB SL Math and a 5 on AP BC Calculus.</p>
<p>IB scores of 7, in general, are few and far between. Scores of 6 are not so rare but are still considerably less common than scores of 4 or 5 (considered together) on most AP tests. </p>
<p>This is something to think about when a student plans what tests to take at the end of high school. Many IB students take AP tests in their SL subjects as "backups" because their colleges don't give credit for IB SL scores. But sometimes, it also makes sense to take an AP test as a backup for an IB HL test. </p>
<p>My daughter did this for English. To place out of a required freshman writing seminar at her college, a student has to have either a 5 on one of the AP English tests (either one will do) or a 7 on the IB HL English test. My daughter knew that the chances of her getting a 7 on the IB test were slim. So she also took the AP English Language test, with no preparation whatsoever. She got a 5 on the AP test (which got her the exemption from the writing course) and a 6 on the IB test (which would have gotten her absolutely nothing).</p>