What it does
I don't recognize "History Teacher" as an official Magic: The Gathering keyword or ability. It's not part of the game's rules vocabulary, and I can't verify it as a real card name either.
A couple of possibilities: you might be thinking of a custom/joke card, a card from another game, or a misremembered name. There are mechanics that care about "historic" permanents (artifacts, legendaries, and Sagas), introduced in Dominaria—abilities that trigger when you cast a historic spell. If that's what you're after, I'm happy to explain how "historic" works in Commander.
If "History Teacher" is from a specific set or a custom card, let me know the exact text or source and I'll break it down accurately rather than guess and give you wrong information.
Iconic cards with History Teacher
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