Pleasant Valley School Unknown Year - Girl in the second row with the checked dress - Mary Stayer Casteel.  End of second row, the last two are possible Ray Stayer and Clarence Stayer, and behind them is Bertha Stayer Foore.  Girl with the dark scarf may be Elsie Claar, and the two tall boys in the back may be Elsie's brothers.  Other surnames would probably be Bagley, Diehl, Dibert and Anderson.