<p>not the same thing as grading papers, but I was an undergrad grader many moons ago. The Computer Science 101 class was very large and had a staff of around 50 students to support the class. </p>
<p>You could start this job as a sophomore and added grading duties later, I don’t remember if only seniors or if juniors and seniors could grade. I remember we graded together in a classroom and ate hawaiian pizza… </p>
<p>This same staff also worked in the labs helping the kids with the programming assignments and also going over tests, this part we were available for all the q&a in the lab, not the particular class we graded for. I don’t remember how well known it was that we were the graders, but I don’t think it was a secret. I think we also proctored the exams. </p>
<p>I don’t remember if upper division classes used undergrads also but although they were lectures they weren’t as huge as this one class. This class and every lecture I remember except one was taught by a professor.</p>