Historical clue formulations

• Classic actress who played the principal in "Grease" — 2012-02-18
• Principal player in "Grease" — 2011-06-03
• "Our Miss Brooks" star of 1950s TV — 2010-03-09
• Player of Principal McGee in "Grease" — 2007-04-28
• Principal McGee's portrayer in "Grease" — 2005-03-04
• "The Mothers-in-Law" star — 1999-10-08
• 50's TV actress — 1996-04-21
• 1953 Emmy-winning actress — 1996-04-20