"Line" seems to be a given. Same with "texture" and "color."
After that, it sort of seems up for grabs--could be "shape," "form," "space"
(from one source)
or it could be "shape" and "mass." Other lists contain pieces and parts of
any of the ones listed so far.
Some lists I've seen start with "dot" (even before "line") and then go on to
include things I consider to be PRINCIPLES of design (such as unity and
balance) in with their elements.
So--what listing of elements of art do you use in your teaching??