http://interval.louisiana.edu/courses/556/556grade.html
Math. 556, Spring, 2006 Grading Policy
Grades will be as in Fall, 2005: The grade will be based primarily on out-of-class assignments and projects, with corrections to the text counted as extra.
You may estimate your letter grade from
90%-100% = "A";
80%-89% = "B";
65%-79% = "C";
50%-65% = "D";
<50% = "F".