Professor Arthur Benjamin is the MAA's sixteenth George Pólya Lecturer.
The award, named for renowned teacher and writer George Pólya (1887–1985), a Hungarian-born mathematician, is meant to encourage “the high quality of exposition which the Mathematical Association of America seeks to encourage”. It pays recipients' expenses for giving talks at MAA regional section meetings.
More details are available in the MAA Online article or the HMC article.