I started first grade in Starkville, MS. in 1970. It was the FIRST YEAR of integration in Mississippi; we were the FIRST CLASS YEAR to ever be integrated from day one. This was backed up to me on an ESPN special I saw about Marcus Dupree; his class in Philadelphia, MS (same year as mine) was also the 1st integrated class.
Even so, we weren't REALLY integrated right away in Starkville. We were in the same school, but all of the black kids for 1st grade were in one classroom; all the white kids were in another. In the afternoons, about 7 or 8 students from each class would move across the hall and "switch" classes to assimilate. Of course, we all played together out on the yard at recess.
I tell my daughters about it and they are dumbstruck that I really lived that experience. The idea of it is so foreign to them, and that is a good thing.