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<p>In many cases, the curricula for AP and IB are similar enough so that you can take both the AP and IB tests after the IB course, without any extra preparation. Your college may not give you credit for the IB score, but they may give you credit for the AP score. </p>
<p>My daughter has an IB diploma. At her college, she got exactly zero credits for her IB scores. It turned out that the college did not give credit for IB scores in two of her three HL subjects, and that they only gave credit for a 7 in the third subject, and she got a 6. And of course, she could not get credit for any of her SL scores. </p>
<p>However, she also took 8 AP tests – mostly on the basis of IB courses rather than AP courses – and got high enough scores to get credit for all of them, for a total of 30 credits and a bunch of exemptions from introductory courses she did not want to take. Some of her AP tests were taken after SL courses, and she still got credit.</p>