My mother also was a 90 day ISTC “wonder” one room coutry school teacher in 2 Coal Mining towns in C. Iowa(Logansport and Ridgeport). I think that if you follow the money(Property Taxes) we may find just why the One Room Coutry School System was killed off.
My mom became a school teacher at Cedar Falls back in the 1940s when it was strictly a teachers college. She taught at the May School, a one room school near Mystic, IA.
After marrying, bringing me into the world and living overseas for a decade, she went back and finished up her BA and MA at Kirksville, MO. She passed away in June 2011.