Joella Gipson and her husband moved back to Los Angeles, and Joella Gipson became a teacher and supervisor for the
Los Angeles Unified School District. It was in this part of her life that her interests shifted to mathematics, and she became certified as a mathematics teacher, regularly attending
National Science Foundation sponsored mathematics institutes from 1958 to 1969. Her husband Theodore Gipson died in Los Angeles in 1972. In 1971, Gipson earned a doctorate in mathematics education from the
University of Illinois Urbana-Champaign, with the dissertation
Teaching probability in the elementary school: an exploratory study, supervised by John A. Easley Jr. Her dissertation also cites the mentorship of Max Beberman, who died before it could be completed. After completing her doctorate, she became an associate professor at
Wayne State University in 1972, and was promoted to full professor in 1978. She served as a
Fulbright Scholar in
Belize in 1994, and again in Romania in 1998. At Wayne State, she also directed the master's program in teaching, the Women, Minorities, and Handicapped Program in Education, and a mathematics education institute, and chaired a commission on the status of women at the university. Gipson married her second husband, William Lawrence Simpson, in 1980. While teaching at Wayne State, she lived across the nearby Canadian border in
Windsor, Ontario. Her husband died in 2005, and she retired as a
professor emerita after 35 years of service at Wayne State in 2007. She died in Windsor on January 31, 2012. ==Books==