Related Clues:

• A+, for one
• Report card letter
• School mark
• Thus one raged to a certain degree
• Road slope
• Cyclist's challenge
• Mark on a paper
• Letter from a teacher?
• F, e.g
• A score?
• A, B, C, D or F
• A-, C+, or F
• Do teacher's homework
• Level, rank
• Level of quality