Subscribe! Want more math video lessons? Visit my website to view all of my math videos organized by course, chapter and section. I make most of my math lessons in a live classroom and do no editing.

I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those experiences to help students improve in math through practical applications and tips.

Valued at $1.6 billion, a tiny start-up called Axiom is building A.I. systems that can check for mistakes. Axiom Math’s founder and chief executive, Carina Hong, right, and the chief technology ...