Probably not. I mean, I remember learning about slavery in not just ancient Rome and Greece, but Mesopotamia too, the Levant, Urek, etc, etc...
LOL - you say this as if kids are even taught about Native Americans at all?
Though in Canada we are taught about Native Canadians - or I was. In Newfoundland it was the Beothuk, here in NB, it was the Mi'kmaq and Maliseet then some of the Western tribes as it came up in Canadian history - Metis, Iroquois, Huron, etc...
Now that, that they teach.
Sure.
But there's a difference between Native Slavery and Black Slavery and the slavery of ancient history.
Care to guess what it is?