This is the last of the Real Photo Postcards from Jen. She purchased them at an antique shop in Grand Forks North Dakota.
This may be a group of students.

M.H.
Ada Sullivan, Fern Hoadle,
Virgil Porter, Elga Hawkins ( Reed),
Marshall Dours, Georglia Brown (Wilson),
Percy Budlong, Lloyd Elstern,
Joe Misner, George Letellier,
Leonard Thomas, Lester Mason,
Bessie Lettenmaier (Rhodes),
Inez Sullivan (Wilbur),
Bertram Mombert,
Orpha Price, Walter Dawes,
Willis Emra, Kearney Cutler,
Gladys Robson, Clarence Mason,
Lester Brock, Lester Ettinger,
Lester Snyder, Prof. Jay Blackney,
Carl Mason, Abbie Andrews,
Laverne Knerr, Bertha Martz and Earl Shelton.
How is that for a bunch of names?
Artura Real Photo Postcards were used between 1910 and 1924.
Thanks for stopping by. Do come again:)
Update from Iggy:
Percy Ernest Budlong (1895-1975) lived in Mill City, Marion, Oregon. He later worked as a Road Construction Supervisor. Bertram Mombert was a time-keeper for a road construction crew, perhaps the same one. Percy had a lot of children.
Jaye Blackney (abt 1899) apparently was only nicknamed "professor" as he isn't listed as a teacher.
Kearney Culter (Sep 1894)
Lester S. Ettinger (abt 1896)
Marshall Dours was Clifford Marshall Dawes, a brother of Walter Dawes (also listed).
Clarence Mason was born on October 31, 1894. Clarence died on March 1967.
George Henry LETELLIER Jr. [Parents] was born 4 Sep 1895 in Oregon. He died 18 Dec 1968 in Sacramento, CA. George was employed by Hammond Lumber Comnpany according to his World War I draft registration card.
The 1910 US Census for Rock Creek, Linn, Oregon (ED 0189) shows Clarence and Carl Mason were cousins, living next door to each other, Bessie Lettenmaier lived next to Clarence. Georgia Brown (adopted) lived next to Bessie. LaVerne Knerr lived around the corner. This school most likely was in Education District 189, Rock Creek, Linn, Oregon.