What are the grades used and what determines each grade

Grades are determined by numbers and letters. The number that you score determines the letter. The letters are A, B, C, D, and F. These can also be followed by a + or -. The number ranges from 0-100 (Excluding extra credit). Ex. if you score 88 on a test, you would normally get a B+. 91-100 = A, 81-90 = B, ect. -'s at the end signify you barely made the assainged grade while +'s show you almost exceded the grade. Hope I helped :>