I got ten papers graded in about two and a half hours (took a couple of short breaks).
It's not the reading through the paper that takes so long, nor yet marking the errors (checkmarks in the right margin, one per grammar/punctuation mistake). Nope, it's writing comments on what they're doing right, and what they need to fix to do better on what they're doing wrong.
And, after four years of doing that on electronic documents, doing that longhand hurts.
3 hours ago