Crossword puzzle clue "class closing"

Class closing?

"Class of" class

Class where you might learn about class, informally?

Second in his class in West Point's class of 1829

History class: F -- “The professor ignored my attendance record and class participation, judging me entirely on ___”

Class, level or class level

Class within a class

"Now slowly closing like ___ in snow" (Robert Frost)