The 12 positions of compositability!
Imgur sources: A is above, but there are two more: B, C. Warning: puerile, vulgar and misogynist comments abound on imgur. Be careful what you click and read.
Funny to see these in this format, but it loses none of its potency.
On youtube: all three are from this video on lack of conservation. Obviously better in video! This related video has more of the interviews.
Ben Orlin writes and draws at one of my favorite blogs, Math with Bad Drawings. Insightful, good math and funny.
Get you best paper, cut a circle and fold it, fold it so that the circumference falls on a fixed point inside. Repeat, using random folds. Now see the creases. This is how you paper-fold an ellipse.
I’ve got the folding circle part in GGB, but hard to capture the idea of marking the folds. Any ideas?
Ladder of Learning.
Had to make an image for this great quote on learning. Saw it at Made by Jones. I think so much bad education policy comes from mandating that everyone has the ladder that you like best.