I mean what is the supposed move to faces and masks based on.

But while we're on that subject, I live with an art and music teacher. He teaches based on the elementary school curriculum he's given, which focuses on the "elements of art": line, shape, color, value, texture, pattern, space, movement, neatness, blah, blah, blah. While I can see that faces would be a better way to teach proportion and symmetry, landscapes, he says, are better for teaching the stuff listed above.

So if landscapes are being replaced, why so? What is the move based on?