I'm sure this will vary for many people depending on their schools, where/when they were taught, and the like, so I'm interested to see what others' experiences have been with this.
I'm also curious about what resources some have used to learn better research skills & media literacy (and found useful) if their school didn't adequately teach either (or they may have whiffed on it at the time).
We were taught basic research skills all throughout highschool, how to find information, how to read and write academic papers and how to cite things properly.
As far as media literacy goes, but our social studies classes always opened with a discussion about the day's news stories as well as the bias of the source it came from.
But I think the class that really opened my eyes the most was a unit in 9th grade English where we discussed the language of advertising. In that class they taught us how anything you see in an ad has to be technically correct as to not run afowl of false advertising laws, but is very often misleading. After that, I started to spot those techniques everywhere, and not just in ads. Those few weeks were foundational to the way I approach critical thought now.