Paul Joseph Sally, Jr. (January 29, 1933 – December 30, 2013) was a professor of mathematics at the University of Chicago,[1] where he was the director of undergraduate studies for 30 years.

[4] He created several programs to improve the preparation of school mathematics teachers, and was seen by many as "a legendary math professor at the University of Chicago.

David, the oldest, is a Visiting Associate Professor of Business Administration at Tuck School of Business at Dartmouth College,[4][10] Stephen is a partner at White & Case[11] (previously Ropes & Gray),[4][12] and Paul, the youngest, is Superintendent at New Trier High School.

[7] He was known to detest cell phones in class and destroyed several over the years by inviting students to stomp on them or by throwing them out of a window.

[4] He co-founded the Young Scholars Program with Dr. Diane Herrmann in 1988, providing mathematical enrichment for gifted Chicago-area students in grades 7–12.