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Christopher Danielson Profile picture
@Trianglemancsd
Jun 9, 2020 • 4 tweets • 2 min read • Read on X
How many?

#unitchat 2 medium eggs equals 1/3 cu...
I call BS on the 7 piece pie. Image
But I have to admit that this right here is a masterwork. Image
What's that? You don't have 38 people sharing your cake? You only have 32?

No worries. Betty Crocker has you covered! Image

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More from @Trianglemancsd

Christopher Danielson Profile picture
Feb 17, 2023
I walked into a classroom full of third graders today, while two of them were very eagerly debating a point with their teacher.

Teacher: "Now that our guest is here, perhaps you could ask the question of him."
Imagine my excitement.
Me: I'd love to hear your question.

3rd Grader: We think 2+2=5

Another 3rd Grader: nodding enthusiastically
Read 13 tweets
Christopher Danielson Profile picture
Sep 14, 2022
On the left is a triangle. On the right is a square. green equilateral triangle block, resting on a table, and an
This is not a tweet about Pattern Blocks; they're just the examples that were ready at hand.
A while back I was yelling about a publisher whose book titled "Rectangles" I found in the public library, and which—pointedly—included no squares.
Read 22 tweets
Christopher Danielson Profile picture
Jul 7, 2022
It's been a while, so here's a moment of recreational mathematics for you...
Here is one of my favorite specialty tiles from the deep triangleman archives. A wooden tile, shaped like half a crescent, but with polygon
That tile is a member of the family of spiraling pentagons and versatiles, and it does lots of fun stuff that they do, and also some other stuff that they do not.

talkingmathwithkids.com/shop/versatile…
Read 26 tweets
Christopher Danielson Profile picture
Sep 24, 2020
A good deal of math's power lies in the problems to which it is applied.
What do we tell students about what math is good for when we select problems?
A journal article got me thinking about that this week. (Cover article in NCTM's MTLT, you can look it up, there's a paywall, you probably know someone who can find you a pdf)
Read 14 tweets
Christopher Danielson Profile picture
Sep 22, 2020
I've had two contrasting experiences in cultural diversity and mathematics in the last 24 hours.
The first was yesterday afternoon, reading the cover story in the latest NCTM teacher journal "The Condo Problem".
That article critiques a textbooky problem that uses marriage as implicitly between a man and a woman, and describes the authors' journey in coming to understand the problem's problematic (as it were) nature.
Read 10 tweets
Christopher Danielson Profile picture
Aug 10, 2020
Story time!
This guy turned 16 last week.

A few folks on here have been around since the beginning. @jmamer1 @TowleMath and a bunch of other folks @connectedmath Image
Others around here may have read of his early math exploits. Critical thinking and all that.

I am happy to report that the occasion of his 16th finds him well of mind and body. Although with questionable taste in music (Africa by Toto is a current fave?!?!?!)
Read 15 tweets

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