This grant provides operational and administrative support for the National Math Festival, a biannual celebration of mathematics and mathematics research held in Washington, D.C. The festival, which drew crowds in excess of 20,000 people in both 2015 and 2017, features publicly accessible lectures on mathematics, interactive exhibits about mathematical concepts, and demonstrations for adults and children of the beauty of mathematical patterns and their prevalence in virtually every facet of life. Grant funds will support production of the National Math Festival in 2019 and 2021, the fielding and analysis of attendee surveys to improve the festival’s offerings, production of a documentary about the festival, and expanded outreach through the web and social media.