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I just downloaded a new app that I think will be helpful reference! It’s called Exploring the Core. (At last check, it was $2.99.) It is, essentially, an easy-to-use [...]

I just had an interesting lab session with a school district we’re working with this year. The teachers (K-2) want to extend the scope and dynamics of their lesson plans, and [...]

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” math, useful math, or [...]

Sometimes you hear the perfect word to describe something you were already doing, but didn’t quite realize you were doing. My most favorite recent case of this came from [...]

I remember years ago reading about Sudoku. Already popular in Japan, the reviewer predicted that it would be featured in newspapers as regularly as crossword puzzles. Since then [...]

We’ll thrilled to be offering math circles for elementary and middle school teachers in partnership with the Washington Experimental Math Lab at the UW. With their generous [...]

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 stats: —19 schools —57 [...]

Tessalation! is a new children’s book about a little girl who discovers tessellations in the outdoor world. I backed the project when it was on Kickstarter earlier this year, [...]

I got a call months ago from someone with what sounded like like a bizarre idea: he claimed he’d invented a special calculator to use as a pedagogical device in the classroom. I [...]

I read pop math books. Quite a few, in fact. Also, sometimes publishers send me advance copies and ask for reviews. I generally read these too. What makes me a bad reviewer is [...]

We’re thrilled to announce that our Kickstarter campaign for Tiny Polka Dot has funded! This means we’ll be bringing this game into the world before the end of the [...]

This Pyramid Puzzle was recently featured in a post in Forbes about our Tiny Polka Dot campaign. Take two suits–that’s 22 cards, with 0 – 10 each occurring twice. The puzzle [...]