Methodist Sunday School Class - 1912.  Bob Cosgrove, Teacher.

Robert E. Cosgrove, born in Nebraska to family Quincy, Illinois, was working at the City Meat Market in 1910, married Florence Moyer in McCook, Nebraska in September 1911.  He had H.C. Hoch build a house in the south part of Yuma (Lougee's Addition) in 1911, and they had a baby girl Frances in 1913, and Lula in 1914. In 1918 he bought a Duroc sow from Joseph Richardson of Yuma.  In 1920 he was farming near Yuma.    In 1937 they were living at 400 South Cedar, and he was custodian at the North School.  Frances  was living with them.  Robert was buried in the Yuma Cemetery in 1963, Florence in 1942.

Action On The Plains has the same photograph, and it says it was a 1913 Presbyterian class, with Okal Churchill as the boy with arms folded.  But the smaller "Action" book says Cosgrove was on the Methodist church-building committee in 1910, so there's more evidence for Methodist.