So you want your kid to know math? Of course you do. Math is an important tool, used widely in many disciplines, and helps us make sense of our world. It’s also beautiful, fun, [...]
We’re happy to announce that our newest math game, Tiny Polka Dot, is now on Kickstarter! Tiny Polka Dot is a math game deck for 3- to 8-year-old children and their families. [...]
So much is coming up! First, Seattle’s Julia Robinson Math Festival is this Sunday. It’s a festival celebrating collaborative, beautiful, non-competitive mathematics. If [...]
I recently received this email from a teacher I work with: “Dan, I have a question for you. I just introduced my [pre-algebra students] to slope and then to slope-intercept form of linear equations and wanted to explore with them some [...]
My knowledge about the foundation history of irrational numbers was challenged today, and I’m pretty happy about it. I had recently tweeted a Vi Hart video that gave a fun, [...]
I first played the game Aggression about five years ago. I had recently read Eric Solomon’s Games with Pencil and Paper, and tried the game out with a student I was working [...]
I recently collected a series of our favorite lessons for fifth graders on the topic of volume into one tidy booklet. I like these lessons a lot. They start with tangible [...]
Recently, Dan gave a TEDx talk based on the blog post 5 Principles of Extraordinary Math Teaching. In the conversations we had with each other and with other educators in the run [...]
Our new lesson plan library is up in beta form. We’re not sharing it widely yet, but it’s getting close. Our goal is to have a collection of great problems for K-6th grade, [...]
On the topic of puzzles, my puzzle in in the NYTimes Numberplay column this week. It’s built to look hard, but come apart easily if you attack it from the right direction. The Rearrangement Puzzle The number 1, 525, 354, 555, 657, 585, [...]
This week’s Sunday puzzle on NPR is a classic from Sam Loyd. Here’s Will Shortz: This is one of the “lost” puzzles of Sam Loyd, the great American puzzlemaker from the 19th and early 20th centuries. It’s from an old magazine with [...]
A colleague of mine once remarked how strange it is that while the Greeks talked about 6-cornered shapes and 4-sided shapes, we talk about hexagons and quadrilaterals. Why is it, [...]
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