All in all, I graded about 2,000 individual lab reports last year in my classes. We had decided that the kids should have composition notebooks that they would hand in and get back once graded. Unfortunately, the grading lag would get bad from time to time and they wouldn’t get feedback before we moved on to the next topic. This really left a division between labs and lectures in my class, that some students found hard to bridge.
This year, I’ve ordered each student a carbon copy lab notebook like those I used in college. Now, they can turn in the cc pages to me for detailed grading, but then we can all go over the lab together and they can make notes and record feedback right away.
Also, they will learn what cc: means in an email. Bonus points.