by A grading scale refers to the system that a teacher will use to convert student numerical scores into letter grades. Traditionally, the grading scale ranges from A for top performing students to F for the lowest performing. Each letter grade is usually accompanied by a percentage that indicates how many questions you answered correctly on an exam or assignment. While there are variations for grading scales that account for plusses or minuses (A+ or A-, etc.), the most common grading scale is:
