The one room Schoolhouse No. 3 was built in 1823 and served West Avon until 1938. In 1981, the building was threatened with demolition to make way for the construction of the new Avon Library. The Avon Historical Society and other local activists arranged to have the school moved to its current address on West Main Street, where it serves as the Living Museum of Avon.
Avon School House No. 3 (1823)
There’s a very similar building in New Canaan, very close to the Pound Ridge, N.Y., border, but it’s a church, not a school house — the Sellecks Corners Church.
http://www.fhsu.edu/~phrp/Selleck/SRA/09.html
There’s a vintage item, a plate, depicting the 1876 school house that was in Plumtree district. Is this that building?