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Essay Submission for Rosenthal Prize, 2022 The Billiard Ball Problem When I first began teaching I felt an urgency to involve my students in mathematical [...]

There’s a new lesson plan just added to our Free Lesson Library: Forty Faces. This has become a favorite of mine for many reasons, and like 1-2 Nim and [...]

In the recent, excellent article for EdReports, 3 Common Misconceptions About High Quality Instructional Materials, author Janna Chan makes a distinction [...]

There’s a huge, untapped possibility to improve math teaching and learning that is more playful and more rigorous than how most of us learned the subject back in the day.

Here’s how I know, and how to make it happen.

Story problems! They are the great bugaboo of math class, the problems everyone remembers hating, On the other hand, when educators think of “real-world” [...]

We recently wrapped up our most ambitious project ever, and as data on it starts to roll in, I thought I’d take a moment to share. Summer Staircase [...]