On winning the award, Holly and James said: 

'We are profoundly grateful to CMJ for seeing fit to publish our work in the first place, and to the Mathematical Association of America for bestowing the George Pólya Award upon us. It is indeed an honour and a privilege to have our paper selected in the midst of so many superb articles that inspire and enthuse the mathematics students of the day. We hope we have given them something new to think about, and we thank CMJ for the opportunity to be part of its readership’s educational experience.'

Congratulations to Holly on this excellent achievement! 

The award announcement, as well as a full list of winners for 2021, is listed on the Mathematical Association of America's website