Marking Schemes
It’s 3.40pm so I’ve reached the tea interval on the first day of marking the scripts from my first-year module on Mechanics and Special Relativity. Blogging will be a bit thin until I’ve completed this task, which will take even longer than usual as we have more students on this module than in previous years, up by more than 50% on last year. At the current rate I estimate it will take me until Friday to finish.
It turned very cold here at the weekend and I realized I had run out of food for the birds so I had to dash out to the shops on Sunday and replenish my stock. When I refilled the feeders it only took a few minutes for the robin to arrive, closely followed by starlings, a magpie, some sparrows, a woodpigeon, and then some more starlings. While I was waiting for my pot of tea to brew I filled the dispensers again.
I woke up this morning to find a very hard frost in Maynooth. The temperature hasn’t risen above zero all day so the frost is still there now. I am at home while I do the marking, which gives me an excuse not to venture out into the cold (except to feed the birds). It’s nice to be in the warm, but marking at home ensures that I am not interrupted by anyone but myself and especially not a student who might wander into my office on campus with all the scripts lying around.

For the last two years we’ve held this examination as an online timed assessment, but now uses old-fashioned written answer books which are much easier on the eye. I still find however that I can only managed about 30 scripts in one sitting before my attention starts to wander. I’ve therefore divided them into five packets, taking a break when I’ve finished each one. Thirty is about the number of overs you get in a session of Test Match Cricket, though I don’t stick very strictly to the same timings; I don’t always have lunch at 1pm, for example.
I’ve often discussed the process of marking examinations with my colleagues and they all have different techniques. What I do is mark one question at a time rather than one script at a time. What I mean by that is that I go through every script marking all the attempts at Question 1, then I start again and do Question 2, etc. I find that this is much quicker and more efficient than marking all the questions in each script then moving onto the next script. The reason for this is that I can upload into my mind the model answer for Question 1 so that it stays there while I mark dozens of attempts at it so I don’t have to keep referring to the marking scheme. Other advantages are that it’s easier to be consistent in giving partial credit when you’re doing the same question over and over again, and that also you spot what the common mistakes are more easily.
Whichever way you do it, grading this number of examinations is a long job, a marathon not a sprint. We also owe it to the students to be as fair as possible, all of which means taking it at a steady pace.
Now, it’s 4pm and time for the resumption…
January 19, 2023 at 2:13 am
I use the same method in grading: mark all instances of Problem 1, then all instances of Problem 2, and so on. After the first ten or so, I usually have seen the most common mistakes, and have written down the partial credit to be given for each one. After that, the remaining instances of the problem go more quickly.
“Ah, this student used sin(x) instead of cos(x), but otherwise followed the proper procedure. 8/10 points.”
January 19, 2023 at 7:32 pm
That is definitely the better way to grade exams, for the reasons you mention: it’s both more efficient and more consistent.