Grading Exams

I'm grading my students' mid-term exams. I remember writing my first student paper. When the professor handed it back it looked like he had bled on it, as it was so covered in red pen marks. I think I received a "C" or a "B-". All but one of my grades that freshman year was a "B-". I think that's what gentlemen got for just showing up.

As mine isn't an English class, I'm trying to be generous and to understand that this may be their first sustained piece of writing.