The American education system is constantly changing. I don't even know how they teach math to kids these days but I would probably think it was completely foo

The American education system is constantly changing. I don't even know how they teach math to kids these days but I would probably think it was completely foolish. Apparently they changed the way they teach spelling and vocabulary and I think the new method is complete nonsense. But the point of the article is that the current mantra seems to be that if 'kids aren't good at math in grade X' then 'teach even more math at grade X-1', which has diminishing returns when you start getting down to kindergarten and such.