Crossword puzzle clue "out of one's class"

"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

Out of one's class

What's needed to get out of class, if you don't know one from the other?