Am thinking this could have been Diary of Anne Frank. I would have been 7th or 8th grade.
The play was the “Diary of Anne Frank”. From left to right, seated on the couch, Audrey Perrotte, not sure of the next gal, Sten (Andy) Casperson, Paul Hickey, Beth Ogden, Pam Proller, John Manley
I recognize some of these names, although not their faces. They had been my classmates before I moved away, I would have graduated with them in 1962.