Grading System in the US The A-F system In many countries including the United States,grades are given on an A-F system where A is best and Fis worst. The letter E is typically omitted,since an F can be turned into an E by drawing a small line at the bottom of the letter,and because E traditionally stood for Excellent but would be very poor on an A-F system.An F grade is failing and results in denial of course credit,while a D is poor,but passing.Most U.S.colleges require grades of C or better in one's major,as well as a 2.0(C)grade point average. A excellent B=good C=average D=poor failureIn many countries including the United States, grades are given on an A-F system where A is best and F is worst. The letter E is typically omitted, since an F can be turned into an E by drawing a small line at the bottom of the letter, and because E traditionally stood for Excellent but would be very poor on an A-F system. An F grade is failing and results in denial of course credit, while a D is poor, but passing. Most U.S. colleges require grades of C or better in one's major, as well as a 2.0 (C) grade point average. A = excellent B = good C = average D = poor F = failure Grading System in the US The A-F system