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Aperiodic monotiles exist!
Some delightful news from the world of pure mathematics yesterday: a team of four mathematician (Smith, Myers, Kaplan, Goodman-Strauss) released a preprint on the Arxiv with a [...]
Family Math Night Resources
[Want to get right to it? This Dropbox folder has all the activities and PDFs linked below.] Teachers, administrators, and students all spend the bulk of their time in schools, [...]
The award-winning lesson plan – the Billiard Ball Problem
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 problem solving. I tried [...]
Another 21st Century Pattern Block Play Idea
I got a fun note from a friend yesterday, who has been playing with 21st Century Pattern Blocks with his 3.5 year old daughter. He had an idea for 21st Century Pattern Block play [...]
Math Play Every Day!
I’ve been following the #MathPlayEveryDay challenge from @EarlyFamilyMath on twitter. If you have or work with young kids, you should too! Day 1 – I Spy Shapes Day 2 – Math & Shop Day 3 – Number Hunt Day 4 [...]
Counting with very young children
Our 3.5 year-old son is suddenly counting everything, all the time. I’m trying to remember what, if anything, we did to support his early mathematical thinking. I do know that we never pressured him to count, or used flash cards, or [...]
Upscale Pattern Block Provocation
Here’s an Upscale Pattern Block provocation to try in a classroom or at home, with your own set of blocks. It take 4 small triangles to build a medium triangle. It also takes 4 small rhombuses to build a medium rhombus. Does it [...]
One problem causes a ton of issues when students learn numbers
It’s hard to comprehend just how mind-bending the place value system must have been to Europeans when Fibonacci imported it from India and the Middle East in the early 13th Century. Imagine trying to multiply Roman numerals together and [...]
Review: Math Games with Bad Drawings
A few years back a book publisher approached us to ask us to write a book of games. We went back and forth over various ideas, and finally started toying with the idea of using illustrations throughout a book that explained math games and [...]
The Teflon Problem
Let’s say you’re in the business of selling cookware to people, and you actually care about them a lot. You want to get them the best pots and pans possible. One option is [...]
The next generation of math blocks is coming!
You may have noticed that there are two new items on the “Award Winning Games” dropdown menu. You might want to check those out 🙂
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 Pig, it’s [...]