Mathematical knowledge: Shows understanding of some of the problem's
mathematical concepts, and principles; and may contain serious computational
errors.
Strategic knowledge: Identifies some important elements of the problems, but
shows only limited understanding of the relationships between them; and gives
some evidence of a solution process, but solution process may be incomplete or
somewhat unsystematic.
Communication: Makes significant progress towards completion of the problem,
but the explanation or description may be somewhat ambiguous or unclear; may
include a diagram which is flawed or unclear; communication may be somewhat
vague or difficult to interpret; and arguments may be incomplete or may be based
on a logically unsound premise.