This is from the pile of stuff I have on my computer about DC History and while reviewing Church Survey uploads that hadn’t a lot of views, I noticed this one. I got this from the Sumner School Archives, a great resource and it is from DCPS Public School Buildings Past and Present, which appears to be an unpublished manuscript.
The Twinning School used to be a school at 3rd and O Streets NW. It was an 8 room school house built in 1883 and demolished sometime around the time Dunbar expanded. When it served as a school it was a segregated white school. It appears that it served as a school for white students until 1918. It became a school for African American students in 1925. In 1930 the Truxton Circle neighborhood was predominately African-American. It soon got absorbed by Armstrong on the other end of the block and became an auxiliary building. Now there is an empty field where it stood.