From the record
“The Arkoma School in Arkoma in Le Flore County, Oklahoma was a Works Progress Administration-funded project completed in 1937. It was listed on the National Register of Historic Places in 1988.”
Wikipedia article Arkoma School, CC BY-SA 4.0.
One of 22 National Register listings published here for Le Flore County · listed in 1988 · category: Building · built in 1937.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service