<p>Teaching, as you mentioned, is just one of the many things you pay a teacher for, as is explaining your grade. Maybe his school has some bizarre policy that states teachers aren’t required to explain grades, but that is unlikely. If your teacher isn’t performing their job, then you need to email the department head. If a teacher didn’t show up to class for a week, would you still suggest not emailing the department head so you don’t risk the teacher not respecting you? This is absurd, 4 weeks is plenty of time for a teacher to respond to an email, if only to say they are really busy and can find time next semester. I’ve never once advocated him try to change his grade, but he needs to find out where he messed up so he won’t repeat the same mistake. “Not bothering” with it is just like saying it isn’t good to learn from your mistakes.</p>