On the audio the woman says Stanley was there in 1959.
http://www.youtube.com/watch?feature=player_embedded&v=jgc3OzyuzMg#!
I think we have established that she possibly was there in the 1958-1959 school year. It's 1959-1960 that is in doubt. She probably graduated high school somewhere Class of 1960, but one image with a sweater and pearls does not a graduate of Mercer Island High School make...