Math Links for Week Ending Jan 16th, 2026

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I don't think you can never have enough resources with "mind benders". So here's a new one that's got @3Blue1Brown at the helm
Curriculum Tags: All
https://momath.org/mindbenders/

Monthly Mind-benders puzzles from Peter Winkler and @3blue1brown.com! A great team together with @momath.bsky.social. The first puzzle is out now. #ITeachMath momath.org/mindbenders/

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— Erick Lee (@theericklee.bsky.social) January 16, 2026 at 2:44 PM

Resource Links

I think that looking at "tricks" like this in terms of why they work is always a good thing.
Curriculum Tags: All
https://bsky.app/profile/mathowitz.bsky.social/post/3mckpwpv42s2v

How to divide a number by 5. Double the number. Move the decimal place one unit to the left. You're welcome. 4283/5 8566 856.6 It's *magic* (and i'm sure it has nothing to do with the fact that 5=10/2 😜)

— Carl (@mathowitz.bsky.social) January 16, 2026 at 1:26 PM

Video Links

I think it's always good to know why algorithms work
Curriculum Tags: MPM2D, MCR3U, MCF3M
https://bsky.app/profile/howiehua.bsky.social/post/3mci3tuvhgc2x

Let's learn how to factor quadratics where the leading coefficient isn't 1 without guessing and checking. (Okay I know that sounds boring but I like this video lol)

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— Howie Hua (@howiehua.bsky.social) January 15, 2026 at 12:21 PM

I think a little geometry could help discover why this works. Here it is in Desmos. When you see it, it makes total sense and all that matters is one piece of wood is twice the width of the other.
Curriculum Tags: MTH1W
https://x.com/Rainmaker1973/status/2012204392494121148

90° angle wood cutting trick

[📹 enticestudio]pic.twitter.com/iNS2ESGies

— Massimo (@Rainmaker1973) January 16, 2026

Image Links

What a great question to ask students
Curriculum Tags: All
https://bsky.app/profile/afetter29.bsky.social/post/3mcizop4nki2z

Here’s an addition to #NoticeWonder. #ElemMathChat

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— afetter29.bsky.social (@afetter29.bsky.social) January 15, 2026 at 9:15 PM

Math Links for Week Ending Jan 9th, 2025

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I have been a Desmos Fellow (now Amplify Fellow) since 2018 and it has given me resources, insight and inspiration. And don't think you have to be a Desmos expert to apply. They are just looking for people with innovative ideas. 
Curriculum Tags: All
https://amplify.com/amplify-classroom-fellows/

Resource Links

I have done this with students but not as a "trick" I like this idea. 
Curriculum Tags: MCR3U, MCF3M
https://bsky.app/profile/ahestenes.bsky.social/post/3mbuo7alwm22y

In #MathsToday I had all the students at the whiteboards and asked them to solve ax^2+bx+c=0 by completing the square. They were so surprised to get the quadratic formula as their answer, and then they were proud they had derived this mystical formula without even realizing they were doing it.

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— Adrienne Hestenes (@ahestenes.bsky.social) January 7, 2026 at 6:56 PM

I like that @KarenCampe shows multiple solutions using different tech platforms.
Curriculum Tags: Gr7, Gr8
https://karendcampe.wordpress.com/2026/01/08/go-for-geometry-8/

New blog post: "Go For Geometry! 8 Congruence Motions" using translation and reflection tools in dynamic #geometry technology. #MTBoS #iTeachMath #T3Learns #MathsToday karendcampe.wordpress.com/2026/01/08/g...

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— Karen Campe (@karencampe.bsky.social) January 8, 2026 at 7:29 AM

Video Links

Help with rotations
Curriculum Tags: Gr7, Gr8
https://bsky.app/profile/tbrzezinski.bsky.social/post/3mbz25cini22y

Exploring rotations in the coordinate plane: drive.google.com/file/d/1maRA... & youtube.com/shorts/g31aC... @desmos.com #MTBoS #ITeachMath #edusky #mathteacher

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— Tim Brzezinski (@tbrzezinski.bsky.social) January 9, 2026 at 12:40 PM

Help with Translations
Curriculum Tags: Gr7, Gr8
https://x.com/TimBrzezinski/status/2009678807645728815

Exploring translation by vector: https://t.co/OyTaf1s6lS & https://t.co/qAT1OJ459a @geogebra #MTBoS #ITeachMath pic.twitter.com/FRt4z5bCIP

— Tim Brzezinski (@TimBrzezinski) January 9, 2026

Connecting circle equations to Pythagoras Theorem
Curriculum Tags: MPM2D
https://x.com/TimBrzezinski/status/2008542725482967139

Making sense of circle equations. Student & teacher resources to accompany: https://t.co/ihRtv3m5gd & https://t.co/KbSxYihpJQ & https://t.co/0UztDShJQJ @geogebra pic.twitter.com/CI0Cgt42SX

— Tim Brzezinski (@TimBrzezinski) January 6, 2026

Image Links

Quadratics are everywhere (although, I think this might be a catenary)
Curriculum Tags: MPM2D, MFM2P, MCR3U, MBF3C, MCF3M
https://bsky.app/profile/priy45hah.bsky.social/post/3mbrwmvctfc24

Natures strength or a parabola 🤔 #MathsToday ❄️

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— Priya Shah (@priy45hah.bsky.social) January 6, 2026 at 4:49 PM

Math Links for Week Ending Jan 2nd, 2026

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I always appreciate teachers who share what they've found on the web. Here's a bunch of resources and pile of people to follow. I've definitely added a few to my list
Curriculum Tags: All
https://mathhombre.blogspot.com/2025/12/playful-math-carnival-183.html

#playfulmath carnival 183! mathhombre.blogspot.com/2025/12/play... Writing on teaching, fun math, puzzles, games, art...

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— John Golden (@johngolden.bsky.social) December 26, 2025 at 9:22 PM

Resource Links

I'm always grateful for these classic Calendar problems. Happy New Year
Curriculum Tags: All
https://karendcampe.wordpress.com/2026/01/01/january-calendar-problems-4/

Happy new #ProblemSolving year! The January Calendar of #math problems is posted!!
Enjoy them w/your students or yourself--please share your thinking & solutions here or on the post. #iTeachMath #MTBoS #T3Learns #RecreationalMathhttps://t.co/huMUVjxa5G

— Karen Campe (@KarenCampe) January 1, 2026

Video Links

I never say no to a good Fibonacci animation
Curriculum Tags: All
https://x.com/truthache68/status/2006797347557355950

Fibonacci Sequence—each number is the sum of the two preceding ones (e.g., 5 + 8 = 13). Is this proof of intelligent design? pic.twitter.com/4HRdAusDWa

— truthache (@truthache68) January 1, 2026

Image Links

Everyone knows I'm a sucker for a good tesselation
Curriculum Tags: All
https://note.com/tairu_mk/n/n0f67f6db98e1

Miko Imura/Hirono Tyle shared a blogpost on this cool heptagon based #tessellation. note.com/tairu_mk/n/n... (in Japanese, but translates well.)

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— John Golden (@johngolden.bsky.social) January 2, 2026 at 6:32 PM

Made in Excel? What the....
Curriculum Tags: All
https://bsky.app/profile/helsig.bsky.social/post/3mbf7uou43225

Prompt: One color, one shape. Irregular hexagons with rotation and scaling. Made in Excel. #genuary #genuary2026 #genuary1

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— Daniel Wilson (@helsig.bsky.social) January 1, 2026 at 3:30 PM