Changing the name
I wonder why, almost a year after the Kennedy assassination (as the diegetic radio tells us), they are only just getting around to changing the name of the school.
At the beginning of the film, the school name is partly changed. The remaining letters are on the ground, waiting to be hauled up. They are doing this on the first day of school.
Seems like poor planning, especially given that the school is run by some quite pedantic, meticulous people at that time.