This article is strange. Unless something has changed recently, AP exams do not have a concept of pass or fail. You get a score and colleges can choose to give you college credit based on the score. I got a 1 on the AP Calculus exam but colleges wanted a 3 or a 4 or a 5 depending on their requirements to give me credit for college calc. So I have no idea what it means to have everybody 'pass'. I have no doubt he's pr…
That reminds me of this:
https://en.wikipedia.org/wiki/Grading_systems_by_country
It's interesting to see where the 'pass' bar is in different countries. I've always found the 50% mark, which seems quite popular, to be rather unusual since it implies that someone who 'passed' essentially was correct on only half the material tested (which is then a fraction of the material actually taught), and in any other setting a 50% failure rate would be completely unacceptable.