Scouting out videos about symmetries does catastrophic things to one's youtube recommendations.

Every fiber of my being was expecting the fourth line to be "Panama."

For my future classroom use, I made a collection of Set card images in new colors.

Looking back over some old calc/precalc materials, I was pleased with the quality of this matching question. Nothing super special, but it works the concept of average rate of change well, I think.

Nope. BALETED

Thanks, no, I didn't mean that. But seriously, thanks for the suggestion.

If you take two unit squares stacked one atop the other, and rotate one through an angle of $$\theta$$ about its center, the area in the intersection of the two squares is an octagon. I found it a pleasant exercise to express the area of the octagon in terms of $$\theta$$.

Nothing special, just a somewhat pleasing (I thought) tiling I drew.

Abstract algebra is a very serious subject and one must, at all times, endeavor to uphold the timeless gravity of this hallowed matter.

Tiling with a Necker Cube-like perceptual flip.

Spoiler

Anyone find any that I've missed here?

I need to make a playable version of this for the browser, but it is a fun puzzle to see how many convex polygons you can form by assembling the seven puzzle pieces here, tangram-fashion. They're drawn on a grid of 30-60-90 triangles.

I have a habit of referring to "eigenstuff" and "eigencritters" in linear algebra, and a student illustrated this.

One should probably not enjoy oneself so much when writing distractors for multiple choice questions. And yet, I do.

My download is stalled at $$1/e$$ complete.

I'm too tasteful to include the heart eyes on the actual slide for class, but really, one must acknowledge the beauty of this stuff.

ja-ja-ja-jetzt wird wieder die Nase geboopt

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