Zermelo-Fraenkel set theory is so widely accepted that modern mathematicians hardly think about it. But believing in its core ...

In this playlist, I show you how to understand set theory. I introduce sets as Venn diagrams, mapping and as sets of numbers.

You're currently following this author! Want to unfollow? Unsubscribe via the link in your email. We recently wrote about how infinitely large sets are not all the same size as each other, but we were ...

In math, Algebra 1 is a make-or-break course. The class is the gateway to high school math, and struggling to complete it can close off those higher-level pathways—and even jeopardize students’ ...

When I was a child, a new way of teaching math was introduced and soon became popular. Often called the “new math”, this approach to math included an attempt to build up all of math from the concepts ...

We recently wrote about how infinitely large sets are not all the same size as each other, but we were a bit vague about what we meant by a set. The people who invented set theory also started out ...