At Barnard, she obtained a degree in ancient history and a minor in psychology by 1933.
She attended Columbia University for her graduate schooling, and obtained a masters degree in education.
[2][3] Upon obtaining her master’s degree in education, Addis worked in a rural one-room school.
She worked there for thirteen years before finally moving to Katonah-Lewisboro School District in 1950.
As a result, Addis became the first writer and designer for computer video games, pioneering the field.