On Stuff this morning:
Scientists are alarmed as a growing number of schools considering ditching science from the compulsory curriculum because it is too difficult for some pupils.
More precisely, "students were struggling to achieve NCEA level 1."
Which is a handy illustration of the following: if, instead of leaving professional educators to get on with educating, you decide that their work must be treated as a business, with the appropriate performance measurements, incentives etc, you will achieve that which you incentivise. And if what you incentivise is the passing of exams, that cause will result in an effect.