How does AP/IB/A level credit work? What can I use it for?

AP credit does not reduce the number of courses required for graduation (31 for the A.B. degree, 36 for the B.S.E.) unless a student has sufficient AP credit and is granted advanced standing. It also cannot be used to fulfill the writing or distribution requirements. AP credit can be used to begin study in fields that have different levels of introductory courses or sequences of several introductory courses at a level that takes into consideration your previous work. In other words, you can avoid having to repeat what you have already learned and can advance to new material. You can also use AP credit to satisfy the A.B. foreign language requirement and parts of the B.S.E. math and science requirements.

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What can my AP credit do for me?