Assignment marking: Do the math

Something I’ve been meaning to blog about for a while is the unseen labour that goes into marking student work.

It’s semester 2 marking time in Australian universities, and I’ve just finished a stack of mine. ‘Stack’ in the figurative sense, because these were a combination of learning logs and and video blogging, all submitted and marked digitally, so there were no actual stacks of anything.

Being the audience and assessor for these students’ work was a privilege, and I don’t think any teacher should forget that having the authority to do this work is always a privilege. Sometimes it is also a joy. And it is always something that we do, knowing the important positive impact that quality feedback has on student learning.

It is a labour of love, but it is a labour to be sure.

Generally a student assignment takes 30 minutes to mark. So they say. Once I get my hand in, I can usually get through an exam response in 20 minutes (they don’t tend to require any feedback), and an essay in 30 minutes, but a set of professional plans (e.g. annotated lesson plans, units of work) takes about 45 minutes and you just can’t rush it.

A typical formula for university marking in my field is that formal assessment feedback and grading for each student should get an hour of your time each semester. That’s 30 minutes for each assignment if you only set two assignments. If you want to set more assignments, it’s on you to mark them quicker. If you’re in the edu-biz, you’ll know that this is where group presentations and short response exam papers start looking attractive.

In a typical semester I have 120 students. That’s maybe 90 students in one big unit, and 30 students in a smaller unit. As a high school teacher this was also roughly the number of students I had – roughly five classes of 25 (some with 30 students, some with closer to 20, e.g. senior classes).

Using me as an example: I set two assignments each semester. And we know that on average I plan to spend 30 minutes on each.

My semester runs for 9 weeks (because it’s followed by prac.), but they can also run for 13 weeks. You can’t really set an assignment in weeks 1 or 2. If the assignment is big, worth 40% or more, you can’t really set it in weeks 3 or 4 either.

Let’s say assignment 1 is submitted in week 5. We’re expected to get work back to students in 2-3 weeks. So they say. Which puts me giving their results back to them in week 8 (a very important deadline if the next assignment is due in week 9).

120 students


30 mins each


60 hours extra work

/over 3 weeks


20 hours of extra work each week.

Add about 3 hours for each of the following:

  • getting your head around the task and long times spent on first few tasks marked
  • moderation with a colleague
  • administration of grades, uploading feedback to LMS etc.

Rinse and repeat just one week later if you have set assignment 2 to be due in week 9.

So if you’ve got about 120 students on average, and managed to keep yourself limited to your 30 minutes per assignment in all units in both semesters, then you will have worked about 23 hours of overtime for 12 weeks out of the year.

I say overtime, because the whole time you’ve been doing this, life, and other work, goes on…

Classes still need teaching. Emails still need answering. You still have to front up to important meetings. Research papers still need writing, grant proposals still need submitting, you may be collecting research data and attending conferences too. If you’re a school teacher, it’s classes, emails, meetings, lesson prep, school dance supervision, year 8 camp, sport coaching, bus duty…the list goes on.

As depressing as this exercise is, I think we should all do the math on this for our own teaching context.

People need to know the reality of what teachers mean when someone asks them how they’re going and the only response they can muster is a stoney-eyed “I’ve been marking”.

Spouses and family members need to be acknowledged for how they support the teachers in their lives during marking seasons.

Teachers need to grasp the reality of their workloads so they aren’t taken by surprise each time the overtime cycle hits, and help each other learn how to manage the physical, mental and emotional toll it takes (or collectively rise up and change this system maybe, hey?).

And beginning teachers need to be aware of what they’re in for.

I am so grateful to my boss for giving me lighter teaching load this semester (just 35 students!) so I can focus on my research publications, but next semester I’ll have 120 students again. I can’t wait to meet them, but I sure do wish their assignments would mark themselves!


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