Rosa Schreurs Jennings, The Country Teacher. The Annals of Iowa, Vol. 31, Number 1 (Summer 1951), pps. 41-62.
This is a memoir of rural schools in Iowa in the 1890s. It is a great survey of what education was like in the late nineteenth century, when teachers boarded with local families and tried to teach elementary school to twenty or thirty kids at many different grade levels.
https://ir.uiowa.edu/cgi/viewcontent.cgi?article=7222&context=annals-of-iowa