Historical clue formulations

• Grp. that's a year below 32-Across — 2024-12-22
• PSAT takers, often — 2022-06-14
• What Joe Biden and Al Gore are: Abbr. — 2020-03-07
• Upper-class members: Abbr. — 2020-02-25
• Third-year students: Abbr. — 2017-12-26
• Many SAT takers: Abbr. — 2017-06-13
• 11th graders: Abbr. — 2016-01-11
• Yearbook sect. — 2014-08-06
• Third class?: Abbr. — 2013-05-23
• Takers of 48-Down: Abbr. — 2012-08-29
• III preceders: Abbr. — 2007-12-02
• Univ. class — 2007-08-11
• High school yearbook sect. — 2004-12-14
• Yearbook sect. — 2004-11-06
• Many namesakes: Abbr. — 2001-02-14
• Some sons — 2000-06-17
• P.S.A.T. takers — 1998-06-01
• Some namesakes, for short — 1996-12-10
• Some H.S. students — 1995-05-27