My dad was a 1949 graduate of South Portland High School.
Some of the teachers he had were just starting their teaching careers back then, but were still teaching when I went through SPHS, some in their last year before retiring. In the program from his graduation ceremony pictured below, Miss Madeline Perazzi accompanied the singing of " The Spirit of the Red and White."
She was still there when I graduated in 1973. And there's dad's name, Seavey, Richard Packard, under "General Course."