Using tech to explore a special right triangle in a thinking classroom: geogebra.org/m/uvuxbqc6 & youtube.com/shorts/IQLC7... @btcthinks.bsky.social @peterliljedahl.bsky.social #MTBoS #iteachmath #mathteacher #edusky

Making sense of radians. And π 🥧 youtube.com/shorts/8_9BW... & resources for teachers and students: drive.google.com/file/d/1YJJB... #MTBoS #ITeachMath #mathteacher #edusky

Circle to triangle: What are the angles? 🤔 youtube.com/shorts/NUqQu... #math #maths #geometry #STEM #STEAM #mathfun #mathteacher #edusky

Right triangle angle trisector surprise! 👀 youtube.com/shorts/QxKNx... #MTBoS #ITeachMath #mathteacher #edusky

Reflecting across 2 parallel lines is equivalent to a single translation by vector. Quick student exploration: www.geogebra.org/m/ta5npwq5 & youtube.com/shorts/nB35Y... @geogebra.org #MTBoS #ITeachMath #mathteacher #edusky

Working with distance in the coordinate plane conceptually using an @openmiddle.com theme: youtube.com/shorts/2fSHm... Resource link: www.geogebra.org/m/darjhqrc @robertkaplinsky.com #MTBoS #ITeachMath #mathteacher #edusky

Composing 2 line reflections about 2 intersecting lines is equivalent to a rotation of double the angle between those 2 lines about their point of intersection: youtube.com/shorts/JmoFo... & www.geogebra.org/m/schvdg2p #MTBoS #ITeachMath #edusky #mathteacher

Exploring line reflections youtube.com/shorts/-15uU... & www.geogebra.org/m/wzkbnnzg

[New Post] Ontario Math Links - My favourite #math related links from this week: ontariomath.blogspot.com/2026/01/math... Links and help from @karencampe.bsky.social @tbrzezinski.bsky.social @amplifyeducation.bsky.social @ahestenes.bsky.social @priy45hah.bsky.social #MathChat #MTBoS #iTeachMath

Triangle with 3 right angles: youtube.com/shorts/prOXv... & www.geogebra.org/m/qfb6cvfv #mathteacher #edusky

Some polygon angle explorations for a thinking classroom: www.geogebra.org/m/qsxbwtct & youtube.com/shorts/iV_jp... @peterliljedahl.bsky.social @btcthinks.bsky.social @geogebra.org #MTBoS #ITeachMath #mathteacher #EduSky

Circle to right triangle: by peeling. youtube.com/shorts/la3iU... #MTBoS #ITeachMath #mathteacher #EduSky

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

Exploring translation by vector: youtube.com/shorts/Q9zFn... & www.geogebra.org/m/axnnavdz #edusky #mathteacher

Dine and Discuss is up and running in January next year! JAN 14, 5:30p - 8:00p, at EastConn in Hampton, CT. We hope to see you there! More info: atomicmath.org.

We are looking forward to learning about mathematics through storytelling from featured speaker Jamil Siddiqui at #ATMNE25. Check out all of the fantastic sessions and register at atmim.net/event-5937758 @atmim.bsky.social

Getting ready for back-to-school night at ESUMS

The #ATMNE25 fall conference has an outstanding lineup of speakers, including featured speaker Amy Chang. You won’t want to miss this conference! Check out the full program and register at atmim.net/event-5937758. @atmim.bsky.social @atmnemath.bsky.social

Happy 3^2 / 4^2 / 5^2 Day! youtube.com/shorts/2arB4... #edusky

Welcome to v 5.0 of the BTC Auto Grading Rubric: OLD BUGS ARE GONE & lots of slick new features have been added, T/Y to Melisa McCain's creative genius! More: youtu.be/_KPXVp7fp-k @peterliljedahl.bsky.social @btcthinks.bsky.social #mathteacher #btcthinks #edusky

#ATMNE25 has an awesome lineup of speakers this year! If you haven't registered yet, there's still time! OCT 30 - 31 in Marlborough, MA. Register here: atmim.wildapricot.org #mathteacher #mathteachers #edusky @atmnemath.bsky.social

Hello #BlueSky & #edusky world! We're a little late to the game here, but we'd love to make our presence known here. We're ATOMIC (Associated Teachers of Mathematics in CT), and would love to connect with other #math & #STEM educators & organizations here! Sincerely, The ATOMIC Board 🙂

Temperature logic? 🤔

Math teachers: When it comes to fostering procedural fluency through a conceptual lens, Graspable Math is an absolute game changer! youtube.com/shorts/5N1nJ...

Period of parent cosine and tangent functions: youtube.com/shorts/ybE9U... & youtube.com/shorts/F4Jdl... #mathteacher #edusky

Triangle + 2 squares surprise: youtube.com/shorts/1EY-_...

Neat triangle phenomenon! youtube.com/shorts/fQ5qy...

Happy Pythagorean Triple Day! Why it is today: youtube.com/shorts/9H3c8... #math #edusky

Surprise in every quadrilateral with perpendicular diagonals youtube.com/shorts/PTJcw...

Mean, median, mode — Quick illustrator : youtube.com/shorts/-Bifz... #MTBoS #ITeachMath #edusky

Who knew Theresa Liljedahl was a Jenga shark? @tbrzezinski.bsky.social is finding out the hard way! Looks like @pgliljedahl.bsky.social isn’t the only one in the family with good spatial sense! The things you learn at #BTCC25

Integrating technology in a 6-12 thinking classroom (quick 1:00 clip) youtu.be/jMZynDueYjk?... @peterliljedahl.bsky.social @btcthinks.bsky.social #mathteacher #edusky

Crazy equilateral triangle phenomenon! youtube.com/shorts/HCQ5c... #math #edusky

100 mph one way. 50 mph going back. Why round-trip average speed IS NOT 75 mph: youtube.com/shorts/MGA_W... #edusky

[New Post] Ontario Math Links - My favourite #math related links from this week: ontariomath.blogspot.com/2025/06/math... links and help from @theericklee.bsky.social @howiehua.bsky.social @tbrzezinski.bsky.social @denisegaskins.com and more #MathChat #MTBoS #iTeachMath #Mathsky

Excited to continue using EdTech to empower Ss to actively explore, discover, & THINK as I further integrate it in BTC practices. Here, the start of a new workshop for 2025 BTC conference in Seattle, & one I'll virtually facilitate later this yr. @peterliljedahl.bsky.social @btcthinks.bsky.social

Can you solve this? 🤔 Solution: youtube.com/shorts/qFh0f... #mathematics #math #edusky

Quick proof as to why the exterior angles of a polygon sum to 360 degrees youtube.com/shorts/aTyJk...

Circle: From area to circumference youtube.com/shorts/rod8_... #math #maths #edusky

Polygon exterior angles - Quick lesson illustration: youtube.com/shorts/9R645... #math #maths #geometry #edusky

It’s June. Get your upper elementary & middle school students doing some mental math outside & play some integer frisbee! Here’s how: youtube.com/shorts/tesO_... #mathteacher #math #teacher #edusky

Making sense of polygon angles youtube.com/shorts/W7l18...

Triangle with 120 degree angle surprise! youtube.com/shorts/2Muq6...

Inverse Functions: Part 2 youtube.com/shorts/dDUQ0... #math #mathematics #edusky

What are inverse functions? Part 1 youtube.com/shorts/84eTr... #math #maths #edusky

In-class parallelogram exploration: youtube.com/shorts/tdFDB...

Triangle cevian surprise! youtube.com/shorts/ChaA8... #math #maths #mathteacher

Lots of “aha!” moments in #geometry class today youtube.com/shorts/OKLgW... #mathteacher #math #edusky

Building, modeling, & transforming in 3D in Geometry class.

What is a function in #mathematics? youtube.com/shorts/nhhoy...