Christopher Danielson
@Trianglemancsd
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Working and playing at the intersection of mathematics and children's minds. Author at Stenhouse. Public Math. (Find me on blue sky, where I am triangleman.)
St Paul, Minnesota
Joined December 2009
Tweetdeck used to be my get-out-of-twitter-malfunctions-free card. No more, it seems. Most of my new tweetable thoughts will be on the sky blue app for the next while. I'm just plain old triangleman over there. Come say hi?
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Guess what just arrived!! How Did You Count? by @Trianglemancsd and YES, it’s just as beautiful as it looks. What a gem! I’m not sharing, so please get your own: https://t.co/t2EYu2KL6W
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From award-winning math author @Trianglemancsd, How Did You Count? is sure to spark conversation, questioning, and wondering amongst younger and older students alike. Get your copy for 20% off during our Mid-Year Sale: https://t.co/6LlCuLKRAL
#StenhousePub
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Twin Cities! Do you have need of a super bright, outgoing and highly talented college student to help you out with a thing this summer? A math or coding camp perhaps? I have just your person! Hit me up and I'll connect you!
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👋 Hi friends! Things got very bad very quickly at work, so I'm back on the market. DM's are open here; you can get in touch here with leads, tips, questions, and any late-breaking berry-picking info:
talkingmathwithkids.com
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Have you followed along with Math On-A-Stick and wondered what it would take to make this kind of joyful, creative math happen in your locality? Well, let's gooooooooooooooo https://t.co/h0rOCL9jGO cc @MathHappensOrg
mathhappens.org
Math at the Fair MathHappens Foundation is inviting applications for teams to participate in Math at the Fair, a project that aims to build playful and creative math experiences at fairs and similar...
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Join us for our annual CONNECT Night for pre-service and new/beginner math teachers of all levels. Register: https://t.co/gYdODmqiq6
@mctm_mn @vangmay1 @Trianglemancsd @saravdwerf
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Not hanging out here these days. Come see me at bluesky, where I am just plain old triangleman. There’s a tiny little giveaway for the new book you’ll find over there.
COMING SOON: How Did You Count? by @Trianglemancsd includes a picture book of delightful photos that invite multiple ways of counting and a teacher’s edition that illuminates the mathematical patterns behind students’ counting. Preorder on Amazon:
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Later this morning!
Any #jmm2025 folks who want to talk outreach should join us Friday morning at 11:00. Details here: https://t.co/WiBt1IXJ9j Hit me up with questions! cc: @MathHappensOrg @JointMath
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Any #jmm2025 folks who want to talk outreach should join us Friday morning at 11:00. Details here: https://t.co/WiBt1IXJ9j Hit me up with questions! cc: @MathHappensOrg @JointMath
docs.google.com
Conversation about Outreach with MathHappens Friday January 10, 2025 11:00 a.m.-12:00 p.m. Diamond B, Sheraton Grand Seattle Description from program: Let's talk about math learning outside of...
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Coming in March!
Hello! Number one way in the coming weeks to support the work that brought you Which One Doesn't Belong?, Tiling Turtles, Math On-A-Stick, and the Hierarchy of Hexagons is this: Pop into your fave bookstore or library to ask for How Did You Count? ISBN: 9781032898353
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Hello! Number one way in the coming weeks to support the work that brought you Which One Doesn't Belong?, Tiling Turtles, Math On-A-Stick, and the Hierarchy of Hexagons is this: Pop into your fave bookstore or library to ask for How Did You Count? ISBN: 9781032898353
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This is a friendly reminder to the #MTBoS, #ITeachMath, and #MfAProud people that the conversations on Bluesky are more meaningful and less cluttered (no ads!). Here are some of my favorite math ed people who have moved to that other place. https://t.co/qyP74kVVvZ
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so much M
〽️〽️〽️〽️
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Good morning, #NCTE24! We are here bright and early in booth #203-205 with a FLASH SALE of 50% off all our #StenhousePub books by teachers, for teachers! Stop on by.
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it's just not how math works. This is wishful thinking combined with misinformation.
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