<p>In the 70s, I led a discussion section and graded papers when I was a sophomore in college (and had just completed taking that course), but not at Stanford. I thought it was a bit awkward that most of the kids in the course were older than I was, but only did it for one term & didn’t get paid anything, only 3 credits or something for being a TA. It was a non-STEM field.</p>