An origin fable.
How lectures came to be.
Advice to Math Teachers Joining Twitter
One (slightly addicted) tweeter's advice.
A year behind in math.
An open letter to struggling students.
Bad exams, great class: an unusual case study in excellent teaching
A surprising course review.
Is a zebra black with white stripes, or white with black stripes?
When silly questions matter.
Humble Alternatives to Daylight Savings Time
Dilation savings time, and other ideas that can't be any worse than what we have now.
Defining “Cat” Without the Cat
Cat? Easily defined. Integral? Less so.
Books I Loved in 2020
Literary, sci-fi, nonfiction, and unclassifiably inventive.
Three Different Ways of Calling Math “Dry”
Mmm, dryness....
The Uncanny Wisdom of Twitter Polls
When are crowds smarter than individuals? And could it possibly happen in, of all places, Twitter?
Math with Bad Drawings 