Historical clue formulations

• Classy establishment? — 2023-03-26
• Group of fish — 2020-05-04
• Dropped out — 2017-05-14
• Group of fish — 2015-07-14
• Teach — 2014-07-17
• See 3-Down — 2010-07-29
• Academy, e.g. — 2008-10-13
• Educate — 2004-02-11
• Group of fish — 2001-08-14
• Teach — 1997-04-19