I got more of a sense of how research is done in college as opposed to high school. I think the simple fact is that there's a lot more information to teach that falls in the "what" category. The actual hands-on work of historians is not something you really study in detail unless you're a history major, I think (I wasn't). In the case of science, I think virtually all children learn about how science experiments are done and the scientific method early in their science education -- perhaps that wasn't quite what you meant. You might be right that the how doesn't get enough focus. But I think that if a student is interested enough in science to be a scientist, that person will not be deterred by missing out on that.