In the US I think it varies a lot from town to town and teacher to teacher.

I had a history teacher in like 10th grade (age ~15). He spent the first bulk of a lesson one day telling us stuff. Everyone was wrapped up in what a good story this was about whatever. Then, in the end of the class he was like “everything I just told you is bullshit. It’s alterations, omissions, and lies to make the story sound better for the victors.”

I don’t remember what the actual subject was, but it was a good lesson in not blindly accepting what a charismatic guy in a suit tells you.