I remember expressing this worry to my husband when preparing for one of my first lectures and he said something like "you're a professor now, you should be able to talk about anything for any amount of time" and now I think of that as the true definition of "professing"
Grace Lindsay
Literally every term I panic that I’m going to run out of material and have to let my class out after 15 minutes and literally every term I re-demonstrate that I can run out of time in a 3 hour class with 15 slides