Ask questions in class. But don't think you've missed your chance
if you don't pipe up immediately. It's easy for an idea to seem clear
during class but mystefying when you go to try to use that idea outside
the classroom. The problems you find thinking things through this way
point out things I should have and would have said earlier. Ask any
time; I am happy to correct the lapse.
This page records answers to some important questions asked outside
of class.