October 8, 2019
12:00PM ET
September 29, 2020
12:00PM ET
- Chris Sangwin (University of Edinburgh)
January 5, 2021
12:00PM ET
- Paul Bourdon (University of Virginia)
February 2, 2021
12:00PM ET
March 2, 2021
12:00PM ET
April 27, 2021
12:00PM ET
September 14, 2021
12:00PM ET
- Lew Ludwig (Denison University)
November 8, 2022
12:00PM ET
- Rose Morris-Wright (Middlebury College)
November 22, 2022
12:00PM ET
- Francis Su (Harvey Mudd College)
February 7, 2023
12:00PM ET
- Diana Skrzydlo (University of Waterloo)
September 26, 2023
12:00PM ET
October 24, 2023
12:00PM ET
- Rachel Weir (Allegheny College)