  Cooper continued teaching at M Street High School until 1930.  She also taught at Frelinghuysen University, holding the office of the president from 1930 to 1941. Over the decades various magazines and newspapers published several of her commentaries on the state of the race. Cooper lived to be 105 years old, residing in Washington D.C. until her death on February 27, 1964. Memorial services were held in Raleigh, North Carolina where she is buried. The cemetery gravestone reads: 