We sang "Dixie" in my NYC-area elementary school.
As did we along with all the other American songs....including BHOTR but admittedly we refrained from the more punitive verses....Grant and Sherman had scourged 100 years before precisely where we then sang
We watched Uncle Remus and the old Coronet Littlest Angel too...in public school.
and said Lord's Prayer...and Onward Christian Soldiers
we were all ruined by that ya know..lol