The older couple in the front middle are my great-great grandparents, John Edgar Robertson (1866-1954) and Mary Ursula Becker Robertson (1864-1943).
They had a total of ten children and 3 of them were dead by 1925, so I am assuming that the other 7 people here are their remaining children.
I am pretty sure that my great-grandmother, Marie Margaret Robertson Thornton is the woman on the left in the back.
Their other living children were: Harry Charles, George Edgar, Helen Alta, Louise Cecelia, Clyde Joseph, and Louis Anthony. If anyone can identify which is which, I would love to know. Thanks!