Crossword puzzle clue "a professor might give a pop one in class"

A professor might give a "pop" one in class

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

First name of Professor Brainard in "The Absent Minded Professor"

Flicker ... pop ... pop ... pop

Pop your pop might have liked

A professor might curve one

Class where you might learn about class, informally?

“In my Soil Mechanics class, the professor droned on about how to use ___”