What does a letter grade mean? Scan a dozen school handbooks or University course catalogs and you will find a largely consistent definition for letter grades.
A = Superior
B = Above Average
C = Average
D = Below Average
F = Your are at the bottom of the heap, among the worst performing in the comparative group.
Admittedly, I have not found any handbooks or catalogs that put it as bluntly as I just did for…