This photo was posted on Facebook in 2020, by the Lanark & District Museum, and is in their collection. Names were contributed by various people, and I've consolidated them here from the Facebook posting's comments. Year the photo was taken, and class grade are as yet unknown.
Geraldine Ryde (teacher),
Centre Row: Beverley Bothwell, Twilla McGinnis, Gail Widenmaier, Ellen Widenmaier.
Front Row: Murray Bell, Ron Shaw, Wayne Knapp, Heike (Hi) Goedhuis, Jan (John) Goedhuis.
Can you provide corrections, comments, or more information?