My maternal grandmother, Bessie Wharton, is probably in this picture.
The board sign resting on ground at left says:
"Carroll Co.
Jamaica School [Called Jamaica Bend School in some records]
Last ? ?"
The Whartons lived (and many died) in Carroll County. The photo was in Bessie Wharton Horn's box. It is most likely that Bessie Wharton is one of the school girls in the photo.
"Missouri Educational Exhibit
World's Fair 1904 St. Louis
Missouri World's Fair Commission
Department of Education
G. O. Buchanan, Superintendent
J. H. Hawthorne, Commissioner"