This class is graded on a strictly percentage basis.
There is no curve.
90% or more = A
80% or more = B
70% or more = C
60% or more = D
(Don't even think about getting less than 60% ie F)
The grade is based 50% on tests and 50% on homeworks. The exact number of tests and homeworks is not entirely even through the semester.
Because grading (even though I do it perfectly and fairly) is not always an exact science, there is some tolerance built around grade break-points. This takes the form of how rounding is done. Under normal mathematical rounding a persons score is rounded to the nearest whole number. In this class rounding is always up to the next whole number when final grades are done. In words a final score of 89.00000000001% would be rounded to 90%. The rationale is that there is no way that grading can be precise enough to tell the difference between a student with 89.49% and 89.51%, so the benefit of the doubt is given to all. All of the hypothetical students in the 89.x examples would be rounded to 90% which is the break-point for an A.