Related Clues:

• Ominous note from a teacher
• Teacher's note accompanying a bad grade, maybe
• Workplace message
• Person writing second message shortened by 60%
• Terse written summons
• Managerial missive
• Note next to a D?
• Note from a teacher (... first 2)
• Worrisome directive from a boss
• Didn't get the ___
• Ominous note from the teacher
• Words next to a D-, maybe
• It might be on a stickie
• Meeting reminder, say
• 'We need to talk' note