there was a special documentary from Nebraska public t.v.
about one room school houses. Several were still used
daily when it was produced a few years back. My mom
went to Burr Oak school and my grandmother taught in
schools in that area in 1907...i still have her certificate!
http://gpn.unl.edu/static_catalog/203_045.html

The historical society in my area recently re-located the
building which was the one room school house in the area,
and it is being re-furbished as a museum, and community center.