One-Room School Houses date back hundreds of years. The Red School in Croydon, NH reports to be the longest continuously operating one-room school house, in use since 1794! The thought of walking five miles, uphill both ways, in the snow, may be a legend, but the one-room schoolhouses our ancestors spoke of, is not. In New Hampshire, there are 7 one-room school houses that may be closed, but historical societies have preserved them for visitors.