Letter grades may be useful when used with clearly define learning
ourtcomes, or better yet, competencies. 
This may be accompanied by direct feedback to student and/or parent, but
may also stand alone if the competencies are stated in a way which is
easily understood. 
This does require more up-fromt work by the learning facilitator
(educator).  However, such a process helps to clarify process and
expectation for both the student and the educator. 
>An "A" from one teacher means something different than an "A" from another
>teacher.  Feedback to students and parents about areas of mastery, or
>proficiency, is more specific than the letter grade.  However, many
>parents strongly prefer the letter grade and have been angry when schools
>have attempted to replace grades with other, more detailed reports about
>student progress.
--"Leslie Lax" <leslax@cnx.net>
Learning-org -- Hosted by Rick Karash <rkarash@karash.com> Public Dialog on Learning Organizations -- <http://www.learning-org.com>