From the record
“The historic Sisters High School was built in 1939 as a public secondary school for the community of Sisters in central Oregon. It was constructed using United States Federal Government funds provided through the Public Works Administration.”
Wikipedia article Sisters High School (historic), CC BY-SA 4.0.
One of 51 National Register listings published here for Deschutes County · listed in 2006 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service