Every day in Calculus, there's a warm-up on the board as students walk in. Gets them thinking and sets the tone before we even start. A few from this week: Crack the Code, Which One Doesn't Belong?, and four trig derivatives. Low stakes, high engagement. #ITeachMath #MathsToday
(I got my masters degree in history of science so it was up my alley.)
I did! And I even read it with students. I too thought it was great. The thing about his work is that it is “real” history of math (like part of the academic history world), so it’s more dense than a lot of popular math books. i wonder if thats why others might not have liked it???
I probably won’t be able to read this book (Proof: How the World Became Geometrical) for a while. But I thought the two other books by the author were great. And what a lovely cover! #mtbos
These are great questions for students to be asking as they approach a challenging math question.
At Gathering 4 Gardner, @cardcolm.bsky.social suggested I try the following 3D-printing project.
Recall the "napkin ring problem": Take a sphere of radius r and drill out a hole along a diameter so the remaining shape has height h. Then the volume, V = πh³/6, does not depend on R.
He thought that
Another 3D-printing suggestion from @cardcolm.bsky.social:
Archimedes proved that if you slice a sphere of radius r with two planes a distance h apart, the surface area is 2πrh—the same as a cylinder of the same radius and height. So, it doesn't depend on where the slicing occurs.
1/2
I used to pride myself on writing questions that assessed what we had talked about, but in new & different ways.
They'd get plenty of "the standard" questions, but I'd regularly mix in extension problems to see how they can apply their understanding.
This was a favorite
#mtbos
#iteachmath
I feel similarly!
Small Rhombicosidodecahedron if u even care.
I know it can be made with a single (incredibly long) modelling balloon because every vertex only has four lines coming from it, so it has an ✨Eulerian path✨
I wrote a blog post about my G4G16 gift. If you want a copy of your own, download and print the files!
Golly I love living in NYC. I got a ticket for this at noon today.
I was filled with childlike wonder for 5 minutes of paper planes swirling down from an oculus…
thewangcontemporary.org/events/20000...
Three knight's tours of a 32x32 chessboard. Each contains the set of edges (knight's moves) shown in the top left. Each is a single unicursal path that can be traced without lifting one's writing implement from the paper. #mathart
Three knight's tours of a 32x32 chessboard. Each contains the set of edges (knight's moves) shown in the top left. Each is a single unicursal path that can be traced without lifting one's writing implement from the paper. #mathart
Three knight's tours of a 32x32 chessboard. Each contains the set of edges (knight's moves) shown in the top left. Each is a single unicursal path that can be traced without lifting one's writing implement from the paper. #mathart
Three knight's tours of a 32x32 chessboard. Each contains the set of edges (knight's moves) shown in the top left. Each is a single unicursal path that can be traced without lifting one's writing implement from the paper. #mathart
Two knight's tour (32x32 and 64x64). Two terms of an infinite sequence of tours.
Built a “3D” sphere (SVG) to show RYB transformations.
Over-iterated in @codepen.io
10% optimization, 90% procrastination.
codepen.io/meodai/full/...
A few more experiments! Nothing new but these look nicer than my last set I think!
#mathart #mtbos
This is so gorgeous!!! And looks like so much fun! 🤩 I must try this at my school!
This afternoon was the "Hands-On Activities" portion of the conference. I brought the supplies (150 laser-cut pieces of wood, 1000 yards of yarn, wood glue, and 50 binder clips) to make a giant cardioid and a giant nephroid. It was fun, and I think they turned out great.
I don't believe you.
This is a first attempt at categorising @catrionaagg.bsky.social 's puzzles by the techniques used to solve them.
My hope is that this makes it easier to use them in class.
notes.mathforge.org/notes/publis...
#mathsky #UKMathsChat #ITeachMath
We were invited to read from our books, which I did of course. But first I had some opening words, which I thought I'd share with you here.
I'll share video too, once that's available.
No.
JK. Yes!
Charles O Perry sculpture in the lobby of the Hyatt Regency in San Francisco
Vector fields as art. In #MathsToday the students had to create a vector field and overlay it with a picture to create Vector Art.
Just a fun little extension at the end of a unit. #iTeachMath
Clap clap clap clap clap
I was gifted a gorgeous origami sculpture of five intersecting tetrahedra. This inspired me to recreate it using Desmos.
www.desmos.com/3d/m7hqyu2gpr
en.wikipedia.org/wiki/Compoun...
@desmos.com #iTeachMath
Oooh I have no idea yet. I literally have been grabbing/creating svg files and using them to draw with the draw tool, or cut with the cut tool. I haven’t really done anything other than this and cutting out pentagons :) but I’m hoping to get inspired???
