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".