I still remember the elements and principles of art from junior high. Color, form, line, shape, space, texture, and value. Then balance, emphasis, gradation, harmony, movement, proportion, rhythm, unity, and variety.
Also the bones of your wrists and ankles. Trapezium, trapezoid, capitate, hamate, triquetral, lunate, scaphoid. And calcaneus, talus, navicular, medial cuneiform, intermediate cuneiform, lateral cuneiform, and cuboid.
The spelling of the word "character." I got it wrong on a spelling quiz in the fifth grade and had to write it out one hundred times.
That is all for now!