Possible Clues:

• Diploma that Mr. Hooper earned on a 1976 episode of "Sesame Street"
• Certificate earned by both Paris Hilton and Jessica Simpson
• Diploma substitute
• Document used in coll. admissions
• HS sheepskin alternative
• It may be obtained before going to coll.
• What a H.S. dropout may earn
• Dropout's alternative
• Resume initials
• Test with a Social Studies sect