History was easily the worst-taught subject in the schools I attended (better than average midwestern U.S. schools).

For some reason, 90% of the time was taken up repeatedly poorly covering a small set of topics: the "fertile crescent" through Greece up to just before Alexander which I suppose satisfied some sort of ancient history requirement, jump ahead to spend a ton of time on the Age of Exploration, a brief stop at colonization and the War of Independence, a bunch more time on the Westward expansion/Native Americans (most time of any single topic or time period, easily) and then memorize a few terms related to the Civil War (Anaconda Plan, four or five important generals, half a dozen battles, etc.).

"Conestoga Wagons" and "Longhouses" must have been answers to test questions in at least five of twelve grades. "Ferdinand Magellan" in at least three.

The overall course of study left one with such an incomplete and disjointed understanding of history as to be nearly useless. I learned more history from 200-300 hours of various not-primarily-educational video games in the same time span than I did from school. We didn't cover American history well, let alone Western history, and certainly not world history. A single semester of Freshman world history in college covered more material and did it better with three hours a week and at a fairly leisurely pace.

[EDIT] I should clarify that my phrasing "fertile crescent through Greece up to just before Alexander" implies a much more complete coverage of early civilization that was actually achieved. Fertile crescent, Tigris and Euphrates, Phoenicians invented the alphabet, name-drop Peloponnesian War and Socrates on a fill-in-the-blanks test, aaaaand moving on to Christopher Columbus.

For me, it was reading the 1632 book series(Ring of Fire). Learned more Swedish/German/European history from fictional alternative history books then apparently EXISTED in my high school history books