Sugar Grove Free Union School, Sugar Grove, PA early 1900s
The four Mattison one I only know who is who by my grandmother's handwriting-
The name on the grass pointing to boy in dark coat in Millard "Eugene" Mattison,
The name on the left in the next to the last row is Carrie Elnor Mattison, going right the line points to Anna Jane Mattison and the Dad is for Thomas Patrick Mattison.
They are the children of Eugene & Margaret Mattison of Sugar Grove, PA
The rest of the children are unknown.