Historical clue formulations

• One might improve a pupil's performance — 2023-11-26
• Accessory on a chain — 2018-01-25
• Item worn by the Count on "Sesame Street" — 2017-02-04
• Item on a chain — 2009-09-03
• Item on a chain, usually — 2007-05-06
• Accessory for the Penguin, in "Batman" — 2005-07-03
• Accessory for Mr. Peanut — 1999-09-01
• Eyewear for Col. Klink — 1996-01-18