This reminds me of something that I've been trying to figure out. Did SAD skip a grade?? If I did the math right, she should have graduated from high school with the class of 1961, not 1960. Was trying to figure out how she would have moved up a class, especially after moving from Kansas to Washington. Kids who move during the school years seem more likely to be held back than to be moved ahead.
The daughter of SAD’s schoolfriend has her in an image with her mother and has captioned the image as Class of 1960:
http://www.good-stock.com/blog/?cat=6&paged=2
And Maxine Box, who calls herself a classmate supplied this to Getty Images:
And that’s about all we know...