Japan and Germany dominate industries like machine tools in part by beginning skilled craft training in high school. They have self-selected fifteen year olds learning how to use industrial lathes and such. Or in the case of Japan learning the hi-tech business of modern fishing actually out on the high seas.
It seems like there might be a good idea there. But of course Friedman is just talking about making sure everyone suffers through algebra II even if they learn nothing from it.