ATTENDANCE

Set to 3 different clues across 3 published puzzles, most often “Factor in grading, perhaps” — The New York Times, Saturday, 9 August 2003.

10 letters

Every clue on record, most used first

Factor in grading, perhapsonce
The New York Times — Saturday, 9 August 2003
Who's thereonce
The New York Times — Friday, 9 February 2001
Teacher's duty [the basis for five anagrams in this puzzle]once
The New York Times — Wednesday, 27 March 1996