This is a photograph from the first year of operation.  When you double-click the photo, then click it again to enlarge it to full size, you can see that the wagons are painted to read "Forest Hill Consolidated School."  I am assuming this to be the entire student body, faculty (and horse teams!) in 1915.  For a fantastic overview of Forest Hill's history, take a look at Carl Burnham's website, or see a copy I saved here in case Carl's site were to go offline.