Theoni Pappas is committed to giving mathematics greater exposure and making it more approachable. Pappas encourages mathematics teachers to share and develop new teaching ideas, methods, and approaches. Her gift to the Mathematics Education Trust (MET) helps teachers in grades 9—12 develop mathematics enrichment materials and lessons complementing a teaching unit implemented in the classroom.

Currently, Pappas is a mathematics educator and consultant. She received her B.A. from the University of California at Berkeley and her M.A. from Stanford University. She became a member of the National Council of Teachers of Mathematics (NCTM) in 1967, when she began teaching high school mathematics. Over the years, she has taught basic math, prealgebra, algebra, trigonometry, geometry, precalculus, and calculus.

Through her studies and research, Pappas has developed products that address mathematical ideas, and she has written numerous books, both for the general public and for educational audiences. Her books include More Joy of Mathematics; The Joy of Mathematics; Mathematics Appreciation; Math Talk; Greek Cooking for Everyone; Fractals, Googols, and Other Mathematical Tales; Mathematical Footprints; The Magic of Mathematics; Math-A-Day; The Music of Reason; Mathematical Scandals; The Adventures of Penrose–the Mathematical Cat; and Math for Kids & Other People Too!