Rhombic tiling, permutation plot, subset gamegraph, permutahedron, hyperplane arrangement, structure diagram, three-dimensional heap, Cayley diagram, braid graph, and L-tromino tiling.

This morning I stumbled on a tab I had open on my web browser for ages for a Ted Talk about productive failure by Manu Kapur. Manu Kapur is a leading expert in productive failure. In Manu’s Ted Talk, these two quotes struck me:

Making learning easy does not necessarily ease learning.

Manu Kapur

If you don't learn to fail, you will fail to learn.

Manu Kapur