School lies to students, and students loose out on credits

[davewill]

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Second, it's normally STUDENTS who pay for the AP exams, the school does not (or can but doesn't have to).  I've not known any kids whose schools pay for it; there is waiver if you're low income, but it's not coming out of the school's pockets, it comes from federal and state grants.
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I'm guessing that while students usually DO pay a fee, that there are costs borne by the school in offering and administering the tests that the principal didn't account for until too late. Or perhaps, the school didn't do their homework so that their student could qualify for the waivers. If somebody at College Board has half a brain, they would step up and offer these kids a make up opportunity in exchange for the positive PR.