I’m happy to run workshops, give keynotes, train teachers, amuse students, or even to impart my entire knowledge of drawing (be forewarned, this takes a full 7-10 minutes).
To inquire, just email the name of the blog at gmail.com.

And in case you were curious, here’s a needlessly comprehensive list of past events:
2025 (a sum of cubes):
- 1/23 to 1/25: a visit to Helsinki with my fabulous Finnish publisher Terra Cognita.
- 2/19 to 2/22: a visit to the University of Michigan for a flurry of talks in Ann Arbor.
- 3/10: a stint as a “celebrity guest judge” at the Minnesota Math Bowl.
- 4/11 to 4/12: a visit to USJ/CSB to keynote the lovely Pi Mu Epsilon Conference.
- 7/7: a visit to the Cambridge Math Circle summer camp in Cambridge, MA.
- 7/17: a visit to the Minnesota Math League Coaches Conference.
- 7/23 to 7/24: a visit to the incomparable Epsilon Camp in St. Louis, Missouri.
- 9/12: a visit to Capitol Hill Middle School in St. Paul.
- 9/18: a seminar at Macalester College.
- 9/20: a keynote at the Rochester (Minnesota) Math Festival.
- 10/2 to 10/3: a visit to University of Chicago and the Metropolitan Math Club of Chicago.
- 10/12: the STEM Book Fest at the Bakken Museum (Minneapolis, MN).
- 10/28: a Zoom event with Math Is Figureoutable.
- 11/19-11/20: a visit as Distinguished Speaker to Winona State University.
2024 (a tetrahedral year):
- 8/8 to 8/9/2024: Mainstage talk and Quoteable Mathematics at MAA’s MathFest in Indianapolis, IN.
- 9/9/2024: Math for English Majors (in conversation with poet Claire Wahmanholm) at Magers & Quinn in Minneapolis, MN.
- 9/14/2024: Math for English Majors (in conversation with mathematician Kristin Heysse) at The Thinking Spot in Wayzata, MN.
- 11/2/2024: Keynote at CMC^3’s Fall Conference in Fairfield, CA.
- 11/9/2024: Keynote and two follow-up workshops at the annual conference of the Association of Mathematics Teachers of New York State (AMTNYS) in Albany, NY.
- 11/16/2025: Featured talk at the “Making Math Moments” digital conference.
2023 (a sum of three perfect cubes, as are each of its divisors)
- 2/2/2023: The Annual Heard Lecture at Wellesley College in Wellesley, MA
- 10/7/2023: Math with Bad Drawings paperback launch at The Thinking Spot in Wayzata, MN
- 10/20/2023: Keynote at MATYCONN (organization of two-year colleges) in Farmington, CT
- 10/30/2023: “Math vs. Science,” at Saint Paul College in Saint Paul, MN
- 11/2/2023: Math games at Broadway Books in Ashland, KY
- 11/3/2023: Talk and workshop at the Shawnee Game Conference in Portsmouth, OH
2022 (a product of three distinct primes):
- 2/5/2022: The Thinking Spot Bookstore in Wayzata, MN
- 3/3/2022: Chicago Latin School in Chicago, IL (math department mini-retreat)
- 3/4/2022: Metropolitan Mathematics Club of Chicago in Chicago, IL (evening lecture)
- 3/31/2022: Willamette University (digital)
- 4/7/2022: Yale Science & Engineering Association Alumni Talk (digital)
- 4/9/2022: A morning of mathematical games with MGCT Choices in Edina, MN
- 5/20/2022: The Thinking Spot Bookstore in Wayzata, MN
- 5/26/2022: Maryland Mathematical Association of Two-Year Colleges (digital keynote)
- 6/17-19/2022: Sci Foo Conference @ Google in Mountain View, CA (invited guest)
- 7/17/2022: Art of Sciences Camp Welcome Address @ Saint Olaf College in Northfield, MN
- 8/30/2022: Math on a Stick, Visiting Mathematician, MN State Fair, in Saint Paul, MN
- 9/17/2022: Rochester Mathematical Festival (keynote) in Rochester, MN
- 9/20/2022: NC Triangle Math Teachers’ Circle (online talk)
- 10/7/2022: Rosebud Books in Helsinki, Finland
- 10/8/2022: Finnish STEM Teachers Association in Espoo, Finland
- 10/19/2022: Volumes (online event) at the National Museum of Mathematics in NYC
- 11/19/2022: American Mathematical Association of Two-Year Colleges (keynote address) annual conference in Toronto, Ontario
- 12/9/2022: Manitoba Remote Learning Support Center (online event) in Winnipeg, Manitoba
- 12/18/2022: Tween Primes (online event) at the National Museum of Mathematics in NY
2021 (a semiprime):
- 2/9/2021: Colgate College (digital; write-up here)
- 2/19/2021: McGraw Hill Keynote Session (digital)
- 4/6/2021: New England Association of Two-Year Colleges (digital)
- 8/17/2021: Art of Problem Solving Math Jam (digital)
- 9/18/2021: Rochester Mathematics Festival (digital)
- 10/25/2021: Minnesota Correctional Facility, Shakopee (class visit)
- 11/2/2021: Los Gatos High School Math Club (digital)
2020 (the year of which we shall not speak):
- 2/12/2020: University of Houston in Houston, TX
- 2/13/2020: Lone Star College in Houston, TX
- 5/4/2020: Grinnell College (digital, class visit)
- 5/20/2020: King Edward’s School (digital)
- 10/23/2020: National Museum of Mathematics (digital)
- 12/3/2020: Macalester College (digital)
2019 (the smallest number written in 6 ways as the sum of the squares of 3 primes):
- 1/9/2019: Google in Cambridge, MA (video on YouTube)
- 1/10/2019: Commonwealth School in Boston, MA
- 1/19/2019: Joint Math Meetings in Baltimore (write-up by the great Anna Haensch)
- 1/31/2019: Loomis Chaffee School in Windsor, CT; keynoted a Connecticut Association of Independent Schools conference on “Writing in Math”
- 2/13/2019: UT Dallas
- 2/14/2019: Baylor University
- 3/7/2019: Smith College
- 3/14/2019: Collegiate School, NYC
- 4/3/2019 and 4/4/2019: University of Michigan, Ann Arbor
- 4/8/2019: University of Massachusetts, Lowell
- 4/11/2019: Association of Mathematics Teachers in Massachusetts (ATMIM) Spring Conference, keynote address, at Holy Cross College, Worcester, MA
- 4/12/2019: Montgomery College, keynote address at undergraduate STEM research conference, Germantown, MD
- 11/6/2019: Greensboro, NC, keynote speaker for the Leadership Seminar of the North Carolina Council of Teachers of Mathematics
- 11/7/2019: Greensboro, NC, keynote speaker for the annual conference of the North Carolina Council of Teachers of Mathematics
- 11/12/2019: Next Chapter Booksellers, Saint Paul, MN
- 12/15/2019: Magers & Quinn Booksellers, Minneapolis, MN
2018 (the year my first book came out):
- 9/26/2018: Holyoke Community College
- 9/26/2018: University of Massachusetts at Amherst
- 9/27/2018: Williams Bookstore
- 10/4/2018: Yale University
- 10/8/2018: Iowa Council of Teachers of Mathematics Conference (slides)
- 10/11/2018: Emmanuel College
- 10/11/2018: Northeastern University
- 10/19/2018: National Museum of Mathematics
- 10/20/2018: Freakonomics Radio Live in NYC (podcast)
- 10/29/2018: Kutztown University
- 10/30/2018: Dickinson College
- 10/30/2018: Gettysburg College
- 10/31/2018: Mount Saint Mary’s University (video)
- 11/1/2018: George Washington University
- 11/2/2018: College of Southern Maryland
- 11/5/2018: University of Maryland, College Park
- 11/6/2018: University of Mary Washington
- 11/6/2018: College of William and Mary
- 11/8/2018: Read Science! (on YouTube)
- 11/8/2018: University of North Carolina, Chapel Hill
- 11/9/2018: Appalachian State University
- 11/12/2018: Hofstra University
- 11/12/2018: Stony Brook University