If you were to study this photo, write down everything that came to mind, a list of words, classmates remembered turning their back to undress for gym? Perhaps the the start of a poem/short story. We used to polish KEDS. try to not let the white rub off onto the marroon gymsuit, which had to be inspected for the ironing, the embroidered name above the left pocket. Like the military. Girls danced the Mexican Hat Dance to scratchy records, and square dancing,too. We actually marched around in formations on rainy days.
Is that in your school?