I mean, really, this is a gimme isn't it? You spend 6 hours a day for at least 10 years going to a building where they are supposed to be teaching you basic life skills, and they don't even teach you how to use the single piece of equipment that you're going to spend more of your time using than any other (disclaimer, I just made that statistic up, but I can't even think of another candidate, so I'm going to go ahead and assert it as fact).
It took me about 10 hours to learn to touch type, very possibly less, and it must save me several hours a week in time spent not looking at the keyboard and, more importantly, not having to correct mistakes that I didn't notice because I was looking at the keyboard instead of the screen.
I propose that teaching kids to touch type would be more useful than literally everything that they learn in school after the age of eleven. Anyone got any counter examples?