One of the justifications for the "New Math" idea was to make it more relevant, to stop people having to do stuffy things like trig and calculus, to provide them with, not so much the rote learning of the underlying structure of an outmoded patriarchal system, but with the numeracy they would actually need for daily life in the new caring and sharing state that would be created by a properly progressive and inclusive modification and modernisation of the way we live now:

Debit cards, store cards and the APR on credit cards
also proved too difficult for many people to explain. One in 20 people
admitted to having "no understanding whatsoever" about money matters,
and one in five claimed to have a "poor understanding".
The
problem is particularly prevalent among younger people, with more than
a third saying that they have little or no understanding.
The
findings come as people are being encouraged to plan carefully for
their future, but it appears that few have the financial understanding
to do so.
Mr Davies said: "The lack of knowledge is likely to become a real problem for Britain’s younger generation."

It’s worked so well, hasn’t it?