Dorothy Walter Baruch was born in San Francisco, California. She studied at Bryn Mawr College and the University of Southern California and earned degrees from Whittier College and the Broadoaks School of Education. She obtained a Ph.D. from Claremont College in 1937. In 1919, she married Herbert M. Baruch, with whom she had two children; in 1946, she remarried to Dr. Hyman Miller. She was the founding director of the Gramercy Cooperative Nursery School from 1924–1927, and was a professor and director of the laboratory school of education at Whittier College from 1930 to 1940. She also organized and directed a parent education program for the National Council of Jewish Women. After World War II, she opened a private practice as a child psychologist, but continued to lecture widely. She wrote articles for academic journals, but also more than 20 books for children. She also produced 11 nonfiction books, mainly for parents, such as You, Your Children and War (1942) and How to Live with Your Teen-ager (1953).