Maybe off topic, but maybe not.
It appears that Al wants to use a method of communicating what a numeric grade means, and he wants to do this in a very standard way. First, at my school, the letter grade says a lot, and Moodle can be configured so that a numeric score gets converted to a letter grade automatically. But some schools apparently need more. At my old school, in the University Catalog, there was a section that verbalized what the letters A, B, C, D, and F meant. So I have never had a need to say this for every assignment.
I just look and found the language that was used (as an example), see below.
So if a student gets a "B" on an assignment, I don't need to say "You have had superior achievement to the basic level."
So all that I am suggesting is a cross-reference from either the numeric score, to a letter grade, to some words that explain what the letter grade means.
