No, I didn’t “realize that” because the conclusion is not supported by the context.
The last slaves were freed in Galveston about 16 days after the war ended and reconstruction began. There’s no grade-school level overview of reconstruction that involves discussion of “slave’s duties” or “skills slaves learned from their slavery” which is commingled with reconstruction, precedes abolition, and requires additional discussion of reconstruction era figures, later.
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Why are you even making up BS to try to defend this? At worst, it is an embarrassment for the Florida Department of Education. Literally if everybody was like “oh, lol, that’s dumb they should fix that,” this thread would be on page 3 by now.